This is a list of stars, neutron stars, white dwarfs and brown dwarfs which are the least voluminous known (the smallest stars by volume).
List
editNotable small stars
editThis is a list of small stars that are notable for characteristics that are not separately listed.
Star name | Star mean radius, kilometres | Star class | Notes | References |
---|---|---|---|---|
PSR B0943+10 | 2.6 | Pulsar (quark star?) | [1] | |
RX J0720.4−3125 | 4.50+0.08 −0.09 – 5.38+0.13 −0.14 |
Neutron star | Neutron stars are stellar remnants produced when a star of around 8–9 solar masses or more explodes in a supernova at the end of its life. They are usually produced by stars of less than 20 solar masses, although a more massive star may produce a neutron star in certain cases. | [2] |
4U 1820-30 | 9.1 | Pulsar | [3] | |
PSR B1257+12 (Lich Pulsar) | 10 | Pulsar | Orbited by three planets. | [4] |
PSR B0531+21 (Crab Pulsar) | 10 | Relatively young at 7200 (or 970 relative to Earth) years old as of May 2024. | [5] | |
Geminga | 10 | [6] | ||
XTE J1739-285 | 10.9 | Pulsar (quark star?) | [7] | |
PSR J1906+0746 | 11.99 – 12.85 | Pulsar | [8] | |
PSR J2043+1711 | 12.13 – 12.96 | [8] | ||
PSR J1933–6211 | 12.15 – 12.98 | [8] | ||
Vela pulsar | 12.52 – 13.30 | [8] | ||
PSR J0348+0432 A | 13 ± 2 | Orbited by a white dwarf star (see below) | [9] | |
PSR J1614−2230 | 13 ± 2 | [10] | ||
GX 13+1 | ≲14.50 | Neutron star | [11] | |
PSR J1748-2446ad | <16 | Pulsar | Fastest-spinning pulsar known. | [12] |
RX J1856.5−3754 | 19 | Neutron star | Closest neutron star discovered to date. | [13] |
PSR B1620-26 A | 24 | Pulsar | An exoplanet orbits PSR B1620-26 A and its white dwarf companion (see below) in a circumbinary orbit. | |
HD 49798 | 1,600 | White dwarf | One of the smallest white dwarf stars known. | [14] |
ZTF J1901+1458 | 1,809 | Currently the most massive white dwarf known. | [15] | |
Janus | 3,400 | A white dwarf with a side of hydrogen and another side of helium. | [16] | |
Wolf 1130 B | 3,480 | [17] | ||
IK Pegasi B | 4,174 | The nearest supernova candidate. (Type Ia) | [18] | |
Sirius B | 5,466 | Historically first detected white dwarf star | [19] | |
LB 1497 | 5,494.5 | [20] | ||
40 Eridani B | 5,547.5 | |||
U Geminorum white dwarf | 5,565 | [21] | ||
BPM 37093 | 5,750 | [22][a] | ||
GRW +70 8247 (Gliese 742) | 5,950 | [23][b] | ||
Gliese 915 | 6,748.3 | [24] | ||
AE Aquarii A | 6,950 | [25] | ||
AR Scorpii | 6,950 | The only known white dwarf pulsar | [26] | |
G 29-38 | 6,950 | [27] | ||
LP 145-141 | 6,950 | 4th nearest white dwarf.[28] | ||
PSR B1620-26 B | 6,950 | An exoplanet orbits PSR B1620-26 B and its pulsar companion (see above) in a circumbinary orbit. | ||
Van Maanen 2 | 6,950 | 3rd nearest white dwarf. | [29] | |
WD 0810–353 | 6,950 | [30] | ||
YZ Leonis Minoris A | 6,950 | [31] | ||
QS Virginis A | 7,658 | [32] | ||
Stein 2051 B | 7,930 | [33] | ||
Ross 548 (ZZ Ceti) | 8,209 | [34] | ||
CR Boötis A | 8,350 | [35] | ||
DQ Herculis A | 8,420 | A slow, bright nova that reached peak brightness on 22 December 1934 with an apparent magnitude of 1.5.[36] | [37] | |
Procyon B | 8,595 | Second nearest white dwarf. | [38] | |
GD 165 A | 8,626.5 | [34] | ||
ESO 439-26 | 8,775.5 | Faintest known white dwarf.[39] | ||
Gliese 293 | 8,900[c] | [24] | ||
Wolf 489 | 9,044 | [40] | ||
HD 44120 C | 9,044 | [41] | ||
WD 1856+534 | 9,113.67 | [42] | ||
Epsilon Reticuli B | 9,185 | [43] | ||
KOI-256 B | 9,350 | [44] | ||
RR Caeli white dwarf | 10,908.5 | [45] | ||
WD 1145+017 | 13,926.84 | Host star of one of the smallest exoplanets. | [46] | |
NN Serpentis white dwarf | 14,679.5 | [47] | ||
Beta Crateris B | 18,800 | [48] | ||
Feige 55 | 19,450 | [49][d] | ||
Central star of the Dumbbell Nebula | 38,265 | [50] | ||
KPD 0005+5106 | 41,045 | [51] | ||
PSR J0348+0432 B | 45,268 | A white dwarf that orbits its pulsar companion (see above) | [9] | |
TMTS J052610.43+593445.1 | 45,916 | B-type subdwarf | Smallest known non-degenerate star. | [52] |
WISEA 1810−1010 | 46,840 | Brown dwarf | Smallest known brown dwarf. | [53] |
EPIC 201702477 | 54,120 | [54] | ||
BE Ursae Majoris A | 54,250 | O-type subdwarf | [55] | |
LP 40-365 | 54,250 | White dwarf | A white dwarf that might have formed in a type Iax supernova. Range of values of 40,350 to 82,095 km | [56] |
CWISE J124909.08+362116.0 | 55,650 | Brown dwarf or red dwarf | A high-velocity star travelling the Milky Way at 456 km/s. | [57] |
Epsilon Indi Ba | 55,656 | Brown dwarf | [58] | |
LHS 6343 C | 55,978 | [59] | ||
Epsilon Indi Bb | 57,050 | [58] | ||
54 Piscium B | 57,050 | [60] | ||
2MASS J1126−5003 | 57,193.5 | [61] | ||
UGPS J0521+3640 | 57,193.5 | |||
Wolf 1130 C | 58,625 | [62] | ||
Gliese 570 D | 59,350 to 66,090 | [63] | ||
EBLM J0555-57Ab | 60,000 | Red dwarf | This red dwarf has a size comparable to that of the planet Saturn. As of 2019, it is the second lightest hydrogen-fusing star known, marginally heavier (0.0777-0.0852M☉) than the 2MASS J0523-1403. Although its mass is comparable to that of TRAPPIST-1, its radius is 1/3 smaller. | [64][65][66] |
Luhman 16 A | 60,768 | Brown dwarf | Luhman 16 A and Luhman 16 B are the closest brown dwarf stars to Earth, and the third-nearest star system to the Solar System. | [e] |
SSSPM J0829-1309 | 61,300 | Red dwarf | An L2 dwarf that is fusing hydrogen. Similarly to 2MASS J0523-1403, SSSPM J0829-1309 is one of the least luminous and massive hydrogen-fusing stars, and is smaller than Jupiter. | [67][68] |
WISE 1405+5534 | 61,483 | Brown dwarf | [69] | |
2MASS 0939-2448 B | 62,600 | [70] | ||
WISE 0855−0714 | 63,500 | Coolest known brown dwarf. | [71][f] | |
2MASS 0243−2453 | 64,000 | [72] | ||
W1906+40 | 64,350 | In 2015 it was shown to have on its surface a storm the size of Jupiter's Great Red Spot. | ||
2MASS J0348−6022 | 64,700 | [73] | ||
SDSS J1416+1348 A | 65,772.5 | [74] | ||
WISEPC J205628.90+145953.3 | 66,487.5 | [69] | ||
WISE 1738+2732 | 66,487.5 | [69] | ||
SCR 1845−6357 A | 66,790 | Red dwarf | ||
2MASS 0937+2931 | 67,200 | Brown dwarf | [75] | |
WISE 0359−5401 | 67,200 | In June 2023, it became the first Y-dwarf with a spectral energy distribution measured by the James Webb Space Telescope. | [76][77] | |
2MASS J22282889–4310262 | 67,200 | [78] | ||
SDSS J1416+1348 B | 67,200 | [79] | ||
DENIS J081730.0−615520 | 67,200 | [75] | ||
WISE 2150–7520 B | 67,900 | [80] | ||
Kelu-1 B | 67,900 | |||
Kelu-1 A | 68,180 | |||
LHS 1070 C | 68,180 | Certainly a brown dwarf based on its mass[81] | [82] | |
DENIS 0255−4700 | 69,570 | [83] | ||
R Aquarii B | 69,570 | White dwarf | Part of a symbiotic binary star system containing a red giant and a white dwarf. | [84] |
HD 114762 B | 69,570 | Red dwarf | [85] | |
2MASS J0407+1546 | 69,570 | Brown dwarf | [86] | |
HN Pegasi B | 70,265 | [87] | ||
2MASS J0523-1403 | 70,600 | Red dwarf | As in 2019, with mass 67.54±12.79MJ (0.0523-0.0767M☉) is the lowest known mass hydrogen-burning star. | [88][67][75] |
GD 165 B | 71,492 | Brown dwarf | [89] | |
15 Sagittae B | 71,492 | [90] | ||
DENIS-P J1058.7−1548 | 71,492 | [91] | ||
LHS 2924 | 71,657 | Red dwarf | [92] | |
2MASS 0036+1821 | 72,200 | Brown dwarf | [75] | |
CoRoT-3 b | 72,200 | [93] | ||
LHS 1070 B | 72,350 | Likely a brown dwarf based on its mass[81] | [82] | |
UGPS 0722-05 | 72,850 | Possibly a rogue planet | [94] | |
WISE 2150–7520 A | 73,635 | [80] | ||
Luhman 16 B | 74,350 | Luhman 16 B and Luhman 16 A are the closest brown dwarf stars to Earth, and the third-nearest star system to the Solar System. | [e] | |
DENIS J1048−3956 | 75,135.5 | Red dwarf | [95] | |
DX Cancri | 76,527 | [96] | ||
LHS 292 | 76,527 | [97] | ||
TVLM 513-46546 | 76,527 | Has one confirmed exoplanet | ||
Gliese 229 B | 79,000 | Brown dwarf | ||
HR 2562 B | 79,350 | Its mass is quite uncertain, at 29±15 MJ .[98] It is cited by the NASA Exoplanet Archive as the most massive exoplanet known.[99] | [100] | |
KELT-1 B | 79,350 | [101] | ||
OGLE-TR-122B | 81,100 | Red dwarf | This was once the smallest known actively fusing star, when found in 2005, through 2013. It is the smallest eclipsing red dwarf, and smallest observationally measured diameter. | [102][103][104] |
CoRoT-15b | 82,200 | Brown dwarf | [105] | |
VB 10 | 82,300 | Red dwarf | It was the smallest known star from 1948 to 1981. | [106] |
TRAPPIST-1 | 82,925 | Hosts a planetary system with at least seven rocky planets. | [107] | |
LHS 2090 | 83,500 | [108] | ||
Teegarden's Star | 83,500 | Has two potentially habitable planets. | [109] | |
VB 8 | 84,450 | [106] | ||
SPECULOOS-3 | 85,570 | Second-smallest star known to host a transiting exoplanet after TRAPPIST-1[110] | [110] | |
2MASS 0939-2448 A | 87,220 | Brown dwarf | [111] | |
Teide 1 | 88,130 | The first brown dwarf to be verified, in 1995. | [112][g] | |
Gliese 412 B | 90,400 | Red dwarf | [113] | |
CFBDSIR 1458+10 B | 90,450 | Brown dwarf | ||
Gliese 1002 | 95,310 | Red dwarf | Has two confirmed exoplanets | [114] |
LHS 1070 A | 97,400 | [82] | ||
LHS 3154 | 97,400 | Has one confirmed exoplanet | [115] | |
Wolf 424 B | 97,400 | [116] | ||
Wolf 359 | 100,180.8 | Fifth-nearest star system to the Solar System. Has one unconfirmed exoplanet | [106] | |
NN Serpentis red dwarf | 103,660 | [117] | ||
CFBDSIR 1458+10 A | 104,350 | Brown dwarf | ||
NY Virginis A | 105,050 | B-type subdwarf | [118] | |
Gliese 1061 | 105,746.4 | Red dwarf | Has three confirmed exoplanets, two of them are in the habitable zone. | [106] |
LP 890-9 | 106,580 | Has two confirmed exoplanets, one of them (LP 890-9c) is in the habitable zone. | [119] | |
Proxima Centauri | 107,277 | This is the nearest neighbouring star to the Sun. Has 2 confirmed exoplanets and one disputed planet | [120] | |
Luyten 726-8 B (UV Ceti) | 110,615 | The archetypal type of the flare stars, and the eight-nearest star system to the Solar System. | [121] | |
GL Virginis | 111,300 | [122] | ||
NY Virginis B | 111,300 | [123] | ||
TZ Arietis | 112,000 | Has one confirmed exoplanet | [124] | |
HD 984 B | 112,700 | Brown dwarf | [125][h] | |
Luyten 726-8 A (BL Ceti) | 114,790 | Red dwarf | Luyten 726-8 A and B are the eight-nearest star system to the Solar System. | [121] |
YZ Ceti | 116,877.5 | Has three confirmed exoplanets | [126] | |
LP 791-18 (TOI-736) | 118,270 | Has three confirmed exoplanets | [127] | |
HR 858 B | 118,270 | [128] | ||
UY Sextantis | 118,270 | B-type subdwarf | [129] | |
Wolf 424 A | 118,270 | Red dwarf | [116] | |
Kepler-42 | 121,750 | Has three confirmed exoplanets | [130] | |
EZ Aquarii A (Luyten 789-6 A) | 121,750 | [116] | ||
HW Virginis B | 121,835 | [131] | ||
Gliese 1151 | 123,900 | Has one confirmed exoplanet | [132] | |
AB Doradus C | 124,100 | Very low-mass star (0.09 M☉) | [133][i] | |
Groombridge 34 B | 125,200 | [134] | ||
Wolf 1069 | 126,130 | Has one confirmed potentially habitable exoplanet | [135] | |
HW Virginis A | 127,404.6 | B-type subdwarf | [131] | |
Gliese 3323 | 129,539.5 | Red dwarf | Has two confirmed exoplanets | [136] |
Barnard's Star | 130,100 | The star with the highest proper motion,[137] and the second-nearest star system to the Solar system. | [106] | |
LHS 3844 (Batsũ̀) | 131,500 | Has one confirmed exoplanet | [138] | |
Ross 248 | 132,200 | Tenth-nearest star system to the Solar System. | [113] | |
Gliese 1128 | 132,200 | [139] | ||
Alpha Mensae B | 132,200 | [140] | ||
Ross 128 | 136,844 | Has one confirmed potentially habitable exoplanet | [141] | |
LTT 1445 C | 137,050 | [142] | ||
Ross 154 | 139,140 | Ninth-nearest star system to our Solar System. | [106] | |
Gliese 1062 | 141,000 | Other sources cites 258,800 km (0.372 R☉)[143] and 285,935 km (0.411 R☉)[144] | [145] | |
Kepler-70 | 141,225 | B-type subdwarf | Has two unconfirmed exoplanets, which may be the hottest exoplanets known. | [146] |
RR Caeli red dwarf | 141,225 | Red dwarf | ||
Gliese 1214 | 141,922 | Has a confirmed exoplanet | [106] | |
Gliese 754 | 142,618.5 | [147] | ||
LHS 1140 | 142,618.5 | Has two confirmed exoplanets | [106] | |
EZ Aquarii B (Luyten 789-6 B) | 146,100 | [148] | ||
Gliese 1132 | 149,575 | Has two confirmed exoplanets | [106] | |
LSR J1835+3259 | 150,133 | Brown dwarf | [149] | |
CT Chamaeleontis B | 157,300 | [150] | ||
Fomalhaut C | 160,000 | Red dwarf | [151][j] | |
V391 Pegasi | 160,000 | B-type subdwarf | Has one exoplanet candidate | [152] |
Kepler-1649 | 161,400 | Red dwarf | Has two confirmed exoplanets | [153] |
LTT 1445 B | 164,185 | [142] | ||
CM Draconis B | 166,700 | [154] | ||
Kepler-429 | 167,000 | B-type subdwarf | Has three exoplanet candidates | [155] |
Kruger 60 B | 167,000 | Red dwarf | [156] | |
Ross 695 | 167,000 | [157] | ||
TOI-715 | 167,000 | Has one confirmed, potentially habitable exoplanet | [158] | |
2M1207 A | 173,925 | Brown dwarf | Has one confirmed exoplanet | [159] |
CM Draconis A | 176,000 | Red dwarf | [160] | |
DG Canum Venaticorum | 176,000 | [161] | ||
Gliese 625 | 177,400 | [162] | ||
Gliese 12 | 182,065 | Has one known exoplanet | [163] | |
AM Herculis red dwarf | 180,882 | [164] | ||
Z Andromedae B | 184,530.63 | White dwarf | Largest known white dwarf. Part of a symbiotic binary star system containing a red giant and a white dwarf. | [165] |
55 Cancri B | 186,447.5 | Red dwarf | [166] | |
LTT 1445 A | 188,500 | Red dwarf | Has three confirmed exoplanets, one of them is in the habitable zone | [167] |
Struve 2398 B | 189,925 | [113] | ||
Gliese 105 B (268 G. Ceti B) | 193,405 | [113] | ||
LHS 475 | 194,030.5 | Has one confirmed exoplanet | [168] | |
HR 7703 B | 194,800 | [156] | ||
Gliese 445 | 198,275 | [169] | ||
Mu Cassiopeiae Ab | 201,750 | [170] | ||
Kapteyn's Star | 202,448.7 | This is the closest halo star to the Sun. | [171] | |
Stein 2051 A | 203,150 | [172] | ||
HN Librae | 208,000 | Has one confirmed planet and one unconfirmed | [173] | |
Gliese 402 | 208,700 | |||
L 98-59 | 210,800 | Has four confirmed exoplanets and one unconfirmed | [174] | |
Gliese 581 | 215,650 | Has three confirmed exoplanets | [106] | |
40 Eridani C | 215,650 | [175] | ||
Wolf 1061 | 221,900 | Has three confirmed exoplanets | [106] | |
Gliese 3929 | 222,600 | Has two confirmed exoplanets | [176] | |
Xi Ursae Majoris Ab | 222,600 | [177] | ||
Kepler-296 B | 224,000 | [178] | ||
YZ Canis Minoris | 225,400 | [124] | ||
LHS 1678 | 228,285 | Has three known exoplanets | [179] | |
Wolf 437 (Gar) | 228,190 | Has one confirmed exoplanet | [180] | |
Gliese 1 | 229,580 | [181] | ||
Wolf 1130 A | 229,580 | [182] | ||
Gliese 357 | 231,650 | Has three confirmed exoplanets | [183] | |
Gliese 667 C | 231,650 | Has two confirmed exoplanets | [106] | |
Kepler-47 B | 235,150 | There are three exoplanets orbiting Kepler-47 B and its companion, Kepler-47 A, in a circumbinary orbit. | [184][185] | |
Luyten's Star | 243,500 | Has two confirmed exoplanets and other two unconfirmed | [186] | |
Kruger 60 A | 243,500 | [156] | ||
Struve 2398 A | 246,300 | [106] | ||
EV Lacertae | 250,500 | On 25 April 2008, a record-setting stellar flare was observed on its surface by NASA's Swift, that was thousands of times more powerful than any solar flare.[187] | [188] | |
Theta Cygni B | 250,500 | [189] | ||
Gliese 251 | 253,235 | Has one confirmed exoplanet | [190] | |
DT Virginis B | 256,000 | [191] | ||
AT Microscopii B | 257,400 | [192] | ||
Regulus C | 257,400 | [193] | ||
Gliese 876 (Ross 780) | 258,800 | Has four confirmed exoplanets | [106] | |
LHS 6343 A | 259,495 | [59] | ||
LTT 3780 (TOI-732) | 260,190 | Has two confirmed exoplanets | [194] | |
TOI-270 | 263,000 | Has three confirmed exoplanets | [195] | |
Gliese 412 A | 264,400 | [113] | ||
KIC 4150611 Ab2 | 264,400 | [196] | ||
Groombridge 34 A | 267,800 | Has two confirmed exoplanets | [106] | |
L 34-26 | 270,000 | It hosts the exoplanet with the longest known orbital period, COCONUTS-2b, which takes about 1.1 million years to complete an orbit around its star.[197] | [198] | |
Gliese 908 (Lalande 46650) | 271,323 | [157] | ||
Gliese 1252 | 272,000 | Has one confirmed exoplanet, an ultra-short-period planet with a daytime temperature measured at 1140 °C.[199] | [200] | |
HIP 79431 (Sharjah) | 272,000 | Has one confirmed exoplanet. Other sources cites radius of 307,500 km (0.442 R☉)[201] and 375,680 km (0.54 R☉)[202] | [203] | |
Lalande 21185 | 273,500 | Sixth-nearest star system to the Solar System. Has two confirmed exoplanets and one unconfirmed | [204] | |
LHS 6343 B | 274,100 | [59] | ||
Gliese 22 B | 274,100 | [205] | ||
Gliese 179 | 278,300 | Has two confirmed exoplanets | [136] | |
HIP 57050 | 278,300 | Has two confirmed exoplanets | [206] | |
KOI-4777 | 278,300 | Has one confirmed exoplanet | [207] | |
Gliese 163 | 284,550 | Has five confirmed exoplanets | [106] | |
AT Microscopii A | 285,250 | [192] | ||
Gliese 588 | 292,200 | [208] | ||
Gliese 686 | 292,200 | Has a confirmed exoplanet | [209] | |
KIC 4150611 Ab1 | 292,200 | [196] | ||
TOI 700 | 292,200 | Has four confirmed exoplanets | [210] | |
QS Virginis B | 292,404 | [32] | ||
Gliese 180 | 294,211.5 | Has two confirmed exoplanets | [136] | |
AD Leonis | 294,500 | [211] | ||
Gliese 408 | 299,150 | [156] | ||
Gliese 3634 | 299,150 | Has a confirmed exoplanet | [212] | |
Gliese 569 A | 299,150 | [213] | ||
U Geminorum red dwarf | 299,150 | [21] | ||
Gliese 436 | 300,542 | Has a confirmed exoplanet | [106] | |
Sigma Coronae Borealis C | 304,000 | [214] | ||
HD 260655 (TOI-4599) | 305,400 | Has two confirmed exoplanets | [215] | |
WR 93b | 306,108 | Wolf-Rayet | [216] | |
Gliese 832 | 307,500 | Red dwarf | Has two exoplanets | [106] |
Gliese 877 | 307,500 | [183] | ||
Gliese 393 | 310,212.5 | [136] | ||
Tabby's Star B | 313,065 | [217] | ||
Gliese 367 (Añañuca) | 317,935 | Has three confirmed exoplanets | [218] | |
Gliese 849 | 322,800 | Has two confirmed exoplanets | [106] | |
K2-18 (EPIC 201912552) | 326,300 | Has two confirmed exoplanets | [219] | |
Gliese 521 | 327,000 | [220] | ||
BAT99-123 | 327,000 | Wolf-Rayet | [221] | |
Lacaille 9352 | 329,750 | Red dwarf | Has two confirmed exoplanets and one unconfirmed | [106] |
Smallest stars by type
editType | Star name | Radius Solar radii (Sun = 1) |
Radius Jupiter radii (Jupiter = 1) |
Radius Earth radii (Earth = 1) |
Radius (km / mi) |
Date | Notes | References |
---|---|---|---|---|---|---|---|---|
Red dwarf | EBLM J0555-57Ab | 0.084 | 0.84 | 9.41 | 60,000 km (37,000 mi) | 2017 | The red dwarf stars are considered the smallest stars known, and representative of the smallest star possible. | [64][65][66] |
Brown dwarf | WISEA 1810−1010 | 0.067 | 0.655 | 7.29 | 46,840 km (29,110 mi) | Brown dwarfs are not massive enough to build up the pressure in the central regions to allow nuclear fusion of hydrogen into helium. They are best described as extremely massive gas giants that were not able to ignite into a hydrogen-fusing star. | [53] | |
White dwarf | HD 49798 | 0.0023 | 0.023 | 0.25 | 1,600 km (990 mi) | 2021 | White dwarfs are stellar remnants produced when a star with around 8 solar masses or less sheds its outer layers into a planetary nebula. The leftover core becomes the white dwarf. It is thought that white dwarfs cool down over quadrillions of years to produce a black dwarf. | [14] |
Neutron star | RX J0720.4−3125 | 0.0000064683 – 0.0000077332 | 0.00006294 – 0.00007525 | 0.0007055 – 0.0008435 | 4.50+0.08 −0.09 – 5.38+0.13 −0.14 |
2012 | Neutron stars are stellar remnants produced when stars with around 9 solar masses or more explode in supernovae at the ends of their lives. They are usually produced by stars with less than 20 solar masses, although a more massive star may produce a neutron star in certain cases. | [2] |
Timeline of smallest red dwarf star recordholders
editRed dwarfs are considered the smallest star known that are active fusion stars, and are the smallest stars possible that is not a brown dwarf.
Star name | Date | Radius Solar radii (Sun = 1) |
Radius Jupiter radii (Jupiter = 1) |
Radius km (mi) |
Notes | |
---|---|---|---|---|---|---|
EBLM J0555-57Ab | 2017- | 0.084 | 0.84 | 60,000 km (37,000 mi) | This star has a size comparable to that of Saturn. | [64][65][66] |
2MASS J0523-1403 | 2013-2017 | 0.102 | 1.01 | 70,600 km (43,900 mi) | Lowest mass main sequence star as in 2020. | [88][67][222][75] |
OGLE-TR-122B | 2005-2013 | 0.117 | 1.16 | 81,100 km (50,400 mi) | [102][103][104] |
Notes
edit- ^ Applying the Stefan–Boltzmann law with a nominal solar effective temperature of 5,772 K:
- .
- ^ Applying the Stefan–Boltzmann law with a nominal solar effective temperature of 5,772 K:
- .
- ^ From surface gravity and mass
- ^ Applying the Stefan–Boltzmann law with a nominal solar effective temperature of 5,772 K:
- .
- ^ a b From : , where is the luminosity, is the radius, is the effective surface temperature and is the Stefan–Boltzmann constant.
- ^ Applying the Stefan–Boltzmann law with a nominal solar effective temperature of 5,772 K:
- .
- ^ Applying the Stefan–Boltzmann law with a nominal solar effective temperature of 5,772 K:
- .
- ^ Applying the Stefan–Boltzmann law with a nominal solar effective temperature of 5,772 K:
- .
- ^ Applying the Stefan–Boltzmann law with a nominal solar effective temperature of 5,772 K:
- .
- ^ Applying the Stefan–Boltzmann law with a nominal solar effective temperature of 5,772 K:
- .
References
edit- ^ Yue, Y. L.; Cui, X. H.; Xu, R. X. (2006-10-01). "Is PSR B0943+10 a low-mass quark star?". The Astrophysical Journal. 649 (2): L95–L98. arXiv:astro-ph/0603468. Bibcode:2006ApJ...649L..95Y. doi:10.1086/508421. ISSN 0004-637X. S2CID 18183996.
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