13h36m31.81s, +03° 40′ 45.9″|
m Task 18 (cosmetic): eval 3 templates: hyphenate params (1×);
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{{Short description|Star in the constellation Virgo}} |
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{{Sky|13|36|31.81|+|03|40|45.9|26.9}} |
{{Sky|13|36|31.81|+|03|40|45.9|26.9}} |
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{{Starbox begin |
{{Starbox begin |
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|name=Wolf |
|name=Wolf 489}} |
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{{Starbox observe |
{{Starbox observe |
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|epoch=[[J2000]]<ref name="Simbad">{{cite web |
|epoch=[[J2000]]<ref name="Simbad">{{cite web |
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| bibcode=2008AJ....135.1225H |
| bibcode=2008AJ....135.1225H |
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| doi=10.1088/0004-6256/135/4/1225 |
| doi=10.1088/0004-6256/135/4/1225 |
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|s2cid=122855486 |
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| url=https://commons.erau.edu/cgi/viewcontent.cgi?article=1948&context=publication}}</ref>}} |
| url=https://commons.erau.edu/cgi/viewcontent.cgi?article=1948&context=publication}}</ref>}} |
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{{Starbox character |
{{Starbox character |
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|class=DZ10.0<ref name="Holberg2008"/><ref name="Sion2009"> |
|class=DZ10.0<ref name="Holberg2008"/><ref name="Sion2009"> |
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|appmag_7=12.69<ref name="Simbad"/>}} |
|appmag_7=12.69<ref name="Simbad"/>}} |
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{{Starbox astrometry |
{{Starbox astrometry |
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|prop_mo_ra=- |
|prop_mo_ra=-3735.839<ref name=EDR3>{{Cite Gaia EDR3|3713594960831605760}}</ref> |
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|prop_mo_dec=- |
|prop_mo_dec=-1113.581<ref name=EDR3/> |
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|parallax= |
|parallax=119.7566 |
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|p_error= |
|p_error=0.0304 |
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|parallax_footnote=<ref name=EDR3/> |
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|parallax_footnote=<ref name="Yale">[http://vizier.cfa.harvard.edu/viz-bin/VizieR?-source=I/238 Yale Trigonometric Parallaxes, Fourth Edition (van Altena+ 1995)]</ref> |
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| absmag_v=15.08<ref name="Holberg2008"/><ref name="Yale"/><ref name="note 1" group="note">From apparent magnitude and parallax.</ref>}} |
| absmag_v=15.08<ref name="Holberg2008"/><ref name="Yale">[http://vizier.cfa.harvard.edu/viz-bin/VizieR?-source=I/238 Yale Trigonometric Parallaxes, Fourth Edition (van Altena+ 1995)]</ref><ref name="note 1" group="note">From apparent magnitude and parallax.</ref>}} |
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{{Starbox detail |
{{Starbox detail |
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| mass=0.55 ± 0.03<ref name="Holberg2008"/> |
| mass=0.55 ± 0.03<ref name="Holberg2008"/> |
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==Distance== |
==Distance== |
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Wolf 489, probably, is the |
Wolf 489, probably, is the 12th closest white dwarf, or, possibly, 9th–14th (see [[Gliese 293]], [[GJ 1087]], [[Gliese 915]], [[GJ 1276]] and [[Gliese 318]]). Its [[parallax|trigonometric parallax]] from YPC (Yale Parallax Catalog) is 121.4 ± 3.4 [[milliarcsecond|mas]],<ref name="Yale"/> corresponding to a distance 8.24 ± 0.23 [[parsec|pc]], or 26.87 ± 0.75 [[light-year|ly]]. |
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{| class="wikitable" |
{| class="wikitable" |
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| YPC, 4th edition|| [http://adsabs.harvard.edu/abs/1995GCTP..C......0V van Altena et al., 1995] || 121.4 ± 3.4 || 8.24 ± 0.23 || 26.87 ± 0.75 || <ref name="Yale"/> |
| YPC, 4th edition|| [http://adsabs.harvard.edu/abs/1995GCTP..C......0V van Altena et al., 1995] || 121.4 ± 3.4 || 8.24 ± 0.23 || 26.87 ± 0.75 || <ref name="Yale"/> |
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|- |
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| Gaia EDR3, 2020|| - || 119.7566±0.0304 || 8.3503±0.0002 || 27.235±0.007|| <ref name=EDR3/> |
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Wolf 489's mass is 0.55 ± 0.03 [[Solar mass]]es,<ref name="Holberg2008"/> its [[surface gravity]] is 10<sup>7.95 ± 0.02</sup> (8.91 · 10<sup>7</sup>) cm·s<sup>−2</sup>,<ref name="Holberg2008"/> or approximately 91 000 of [[Earth's gravity|Earth's]], corresponding to a radius 9089 km, or 143% of [[Earth's radius|Earth's]]. |
Wolf 489's mass is 0.55 ± 0.03 [[Solar mass]]es,<ref name="Holberg2008"/> its [[surface gravity]] is 10<sup>7.95 ± 0.02</sup> (8.91 · 10<sup>7</sup>) cm·s<sup>−2</sup>,<ref name="Holberg2008"/> or approximately 91 000 of [[Earth's gravity|Earth's]], corresponding to a radius 9089 km, or 143% of [[Earth's radius|Earth's]]. |
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Wolf 489's temperature is 5030 ± 120 [[Kelvin degree|K]]<ref name="Holberg2008"/> (comparable with that of early [[K-type main sequence star]]s); its cooling age, i. e. age as degenerate star (not including lifetime as main sequence star and as giant star) is 5.19 [[Gigayear|Gyr]].<ref name="Sion2009"/> |
Wolf 489's temperature is 5030 ± 120 [[Kelvin degree|K]]<ref name="Holberg2008"/> (comparable with that of early [[K-type main sequence star]]s); its cooling age, i. e. age as degenerate star (not including lifetime as main sequence star and as giant star) is 5.19 [[Gigayear|Gyr]].<ref name="Sion2009"/> Wolf 489 and should appear white with a slight shade of yellow, nealy the same color asa K-type main sequence star. |
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==Notes== |
==Notes== |
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==References== |
==References== |
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{{reflist |
{{reflist}} |
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{{Stars of Virgo}} |
{{Stars of Virgo}} |
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{{DEFAULTSORT:Wolf 489}} |
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[[Category:White dwarfs]] |
[[Category:White dwarfs]] |
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[[Category:Virgo (constellation)]] |
[[Category:Virgo (constellation)]] |
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[[Category:Gliese and GJ objects|0518]] |
[[Category:Gliese and GJ objects|0518]] |
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[[Category:2MASS objects]] |
[[Category:2MASS objects|J13363181+0340458]] |
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Wolf 489 (WD 1334+039, LHS 46, G 062-053, Gliese 518) is a nearby degenerate star (white dwarf) of spectral class DZ10.0[2][3]), the single known component of the system, located in the constellation Virgo.
Wolf 489, probably, is the 12th closest white dwarf, or, possibly, 9th–14th (see Gliese 293, GJ 1087, Gliese 915, GJ 1276 and Gliese 318). Its trigonometric parallax from YPC (Yale Parallax Catalog) is 121.4 ± 3.4 mas,[5] corresponding to a distance 8.24 ± 0.23 pc, or 26.87 ± 0.75 ly.
| Source | Paper | Parallax, mas | Distance, pc | Distance, ly | Ref. |
|---|---|---|---|---|---|
| Woolley (1970) | Woolley et al., 1970 | 135 ± 12 | 7.4 ± 0.7 | 24.2 ± 2.1 | [6] |
| GJ, 3rd version | Gliese, Jahreiss, 1991 | 122.2 ± 3.9 | 8.18 ± 0.26 | 26.69 ± 0.85 | [7] |
| YPC, 4th edition | van Altena et al., 1995 | 121.4 ± 3.4 | 8.24 ± 0.23 | 26.87 ± 0.75 | [5] |
| Gaia EDR3, 2020 | - | 119.7566±0.0304 | 8.3503±0.0002 | 27.235±0.007 | [4] |
Wolf 489's mass is 0.55 ± 0.03 Solar masses,[2] its surface gravity is 107.95 ± 0.02 (8.91 · 107) cm·s−2,[2] or approximately 91 000 of Earth's, corresponding to a radius 9089 km, or 143% of Earth's.
Wolf 489's temperature is 5030 ± 120 K[2] (comparable with that of early K-type main sequence stars); its cooling age, i. e. age as degenerate star (not including lifetime as main sequence star and as giant star) is 5.19 Gyr.[3] Wolf 489 and should appear white with a slight shade of yellow, nealy the same color as a K-type main sequence star.
