H1504+65
Sign in to saveH1504+65 is an enigmatic peculiar star in the constellation Ursa Minor. With a surface temperature of 200,000 K (360,000°F) and an atmosphere composed of carbon, oxygen and 2% neon, it is the second hottest white dwarf ever discovered, with only RX J0439.8−6809 being hotter. It is thought to be the stellar core of a post-asymptotic giant branch star, though its composition is unexplainable by current models of stellar evolution.
Wikidata facts
- Instance of
- astrophysical X-ray source
- Constellation
- Ursa Minor
- Distance from Earth
- 486.0740
- Image
- Artist's impression of the white dwarf star H1504+65 (2004-h1504).jpg
Show 12 more facts
- catalog code
- Gaia DR2 1645296216119116928
- right ascension
- 225.54012356326640
- declination
- 66.20531836515290
- spectral class
- PG1159
- parallax
- 2.0573
- apparent magnitude
- 17.368
- epoch
- J2000.0
- effective temperature
- 0
- surface gravity
- 54000000
- right ascension component of proper motion
- 0
- declination component of proper motion
- 12
- Commons category
- H1504+65
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Encyclopedic overview
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- References
H1504+65 is an enigmatic peculiar star in the constellation Ursa Minor. With a surface temperature of 200,000 K (360,000°F) and an atmosphere composed of carbon, oxygen and 2% neon, it is the second hottest white dwarf ever discovered, with only RX J0439.8−6809 being hotter. It is thought to be the stellar core of a post-asymptotic giant branch star, though its composition is unexplainable by current models of stellar evolution.
==References==
Excerpted from Wikipedia’s “H1504+65” article, available under the CC BY-SA 4.0 licence.