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Celsius versus kelvins edit
Information for Nasa's web site, Astronomy Picture of the Day (Feb 15, 2007) http://antwrp.gsfc.nasa.gov/apod/ap070215.html states a temperature of 200,000 Kelvins. This Wiki states 200,000 Celsius.
Dealing with inconsistent distances edit
An article in Astronomy magazine says that the central star of NGC 2440 lies about 7,100 light years from Earth. Yet a section of HubbleSite says that the nebula lies about 4,000 light years from Earth. Which is which? Micasta (talk) 02:11, 3 March 2009 (UTC)
- [1] 2.19 kpc 76.66.193.90 (talk) 07:27, 3 March 2009 (UTC)
Amazing! Thank you! :) Micasta (talk) 10:49, 3 March 2009 (UTC)
Magnitude of the nebula edit
The value of apparent magnitude originally written in this article was 18.9B. This is inconsistent with the values I've been seeing in the Internet, wherein the nebula was placed at a brighter 9 to 11th magnitude. The central star, however, is a faint star, at least 17.7 magnitude, so I assume that the 18.9B originally written in this article was the magnitude of the central star. Kindly contradict and correct if necessary. Thank you. :) Micasta (talk) 05:04, 4 March 2009 (UTC)
To add to this, the original value of magnitude given by Herschel was 9.1 . Micasta (talk) 05:06, 4 March 2009 (UTC)
Assessment comment edit
The comment(s) below were originally left at Talk:NGC 2440/Comments, and are posted here for posterity. Following several discussions in past years, these subpages are now deprecated. The comments may be irrelevant or outdated; if so, please feel free to remove this section.
| Information for Nasa's web site, Astronomy Picture of the Day (Feb 15, 2007) states a temperature of 200,000 Kelvins. This Wiki states 200,000 Celsius. This is quite a large discrepancy. |
Last edited at 13:52, 17 February 2007 (UTC). Substituted at 00:45, 30 April 2016 (UTC)