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Coordinates: Sky map 13h 36m 31.81s, +03° 40′ 45.9″
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{{Short description|Star in the constellation Virgo}}
{{Sky|13|36|31.81|+|03|40|45.9|26.9}}
{{Sky|13|36|31.81|+|03|40|45.9|26.9}}
{{Starbox begin
{{Starbox begin
|name=Wolf 489 aka big wolf 489}}
|name=Wolf 489}}
{{Starbox observe
{{Starbox observe
|epoch=[[J2000]]<ref name="Simbad">{{cite web
|epoch=[[J2000]]<ref name="Simbad">{{cite web
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| title =GJ 518 -- White Dwarf
| title =GJ 518 -- White Dwarf
| publisher=[[Centre de Données astronomiques de Strasbourg]]
| publisher=[[Centre de Données astronomiques de Strasbourg]]
| accessdate=2011-11-02}}</ref>
| access-date=2011-11-02}}</ref>
|equinox=[[J2000]]<ref name="Simbad"/>
|equinox=[[J2000]]<ref name="Simbad"/>
|constell=[[Virgo (constellation)|Virgo]]
|constell=[[Virgo (constellation)|Virgo]]
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| last=Holberg |first=J. B.
| last=Holberg |first=J. B.
|author2=Sion |author3=Oswalt |author4=McCook |author5=Foran |author6= Subasavage
|author2=Sion |author3=Oswalt |author4=McCook |author5=Foran |author6= Subasavage
|title=A New Look at the Local White Dwarf Population
| year=2008
| year=2008
| title=A NEW LOOK AT THE LOCAL WHITE DWARF POPULATION
| journal=[[The Astronomical Journal]]
| journal=[[The Astronomical Journal]]
| volume=135 | pages=1225–1238
| volume=135 |issue=4
| pages=1225–1238
| bibcode=2008AJ....135.1225H
| bibcode=2008AJ....135.1225H
| doi=10.1088/0004-6256/135/4/1225
| doi=10.1088/0004-6256/135/4/1225
|s2cid=122855486
| 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>}}
{{Starbox character
{{Starbox character
|class=DZ10.0<ref name="Holberg2008"/><ref name="Sion2009">
|class=DZ10.0<ref name="Holberg2008"/><ref name="Sion2009">
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| last=Sion |first=Edward M.
| last=Sion |first=Edward M.
|author2=Holberg |author3=Oswalt |author4=McCook |author5= Wasatonic
|author2=Holberg |author3=Oswalt |author4=McCook |author5= Wasatonic
|title=The White Dwarfs within 20 Parsecs of the Sun: Kinematics and Statistics
| year=2009
| year=2009
| title=THE WHITE DWARFS WITHIN 20 PARSECS OF THE SUN: KINEMATICS AND STATISTICS
| journal=[[The Astronomical Journal]]
| journal=[[The Astronomical Journal]]
| volume=138 | pages=1681–1689
| volume=138 |issue=6
| pages=1681–1689
| bibcode=2009AJ....138.1681S
| bibcode=2009AJ....138.1681S
| doi=10.1088/0004-6256/138/6/1681
| doi=10.1088/0004-6256/138/6/1681
|arxiv = 0910.1288 }}</ref>
|arxiv = 0910.1288 |s2cid=119284418
}}</ref>
|appmag_1_passband=B
|appmag_1_passband=B
|appmag_1=15.59<ref name="Simbad"/>
|appmag_1=15.59<ref name="Simbad"/>
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|appmag_7=12.69<ref name="Simbad"/>}}
|appmag_7=12.69<ref name="Simbad"/>}}
{{Starbox astrometry
{{Starbox astrometry
|prop_mo_ra=-3706<ref name="Sion2009"/>
|prop_mo_ra=-3735.839<ref name=EDR3>{{Cite Gaia EDR3|3713594960831605760}}</ref>
|prop_mo_dec=-1149<ref name="Sion2009"/>
|prop_mo_dec=-1113.581<ref name=EDR3/>
|parallax=121.4
|parallax=119.7566
|p_error=3.4
|p_error=0.0304
|parallax_footnote=<ref name=EDR3/>
|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>
| 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>}}
{{Starbox detail
{{Starbox detail
| mass=0.55 ± 0.03<ref name="Holberg2008"/>
| mass=0.55 ± 0.03<ref name="Holberg2008"/>
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==Distance==
==Distance==


Wolf 489, probably, is the 129th closest white dwarf, or, possibly, 129th–214th (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]].
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]].


{| 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"/>
|-
| Gaia EDR3, 2020|| - || 119.7566±0.0304 || 8.3503±0.0002 || 27.235±0.007|| <ref name=EDR3/>
|}
|}


==Physical parameters==
==Physical parameters==


Wolf 489's mass is 0.55 ± 0.03 Its a Starwars planet not a star, people get big confused cause they cannot admit they were wrong, we call those people big stinky hehe[[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&nbsp;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&nbsp;km, or 143% of [[Earth's radius|Earth's]].


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"/> Despite its official classification as "white dwarf", Wolf 489 is not actually white due to low temperature, and should appear the same color as K-type main sequence stars, often referred to as "[[orange dwarf]]s".
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 as a K-type main sequence star.


==Notes==
==Notes==
<references group="note"/>
<references group="note"/>
Its actually a planet from star wars that george lucas invented. People get confused if its real or not but it isn't. It's also cannon so screw you reeee.


==See also==
==See also==
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==References==
==References==
{{reflist|colwidth=30em}}
{{reflist}}


{{Stars of Virgo}}
{{Stars of Virgo}}


{{DEFAULTSORT:Wolf 489}}
[[Category:White dwarfs]]
[[Category:White dwarfs]]
[[Category:Virgo (constellation)]]
[[Category:Virgo (constellation)]]
[[Category:Gliese and GJ objects|0518]]
[[Category:Gliese and GJ objects|0518]]
[[Category:2MASS objects]]
[[Category:2MASS objects|J13363181+0340458]]

Latest revision as of 07:48, 27 February 2023

Wolf 489
Observation data
Epoch J2000[1]      Equinox J2000[1]
Constellation Virgo
Right ascension 13h 36m 31.81s[1]
Declination +03° 40′ 45.″[1]
Apparent magnitude (V) 14.66[2]
Characteristics
Spectral type DZ10.0[2][3]
Apparent magnitude (B) 15.59[1]
Apparent magnitude (V) 14.63[1]
Apparent magnitude (R) 14.0[1]
Apparent magnitude (I) 14.1[1]
Apparent magnitude (J) 13.06[1]
Apparent magnitude (H) 12.82[1]
Apparent magnitude (K) 12.69[1]
Astrometry
Proper motion (μ) RA: -3735.839[4] mas/yr
Dec.: -1113.581[4] mas/yr
Parallax (π)119.7566 ± 0.0304 mas[4]
Distance27.235 ± 0.007 ly
(8.350 ± 0.002 pc)
Absolute magnitude (MV)15.08[2][5][note 1]
Details
Mass0.55 ± 0.03[2] M
Radius0.013[2][note 2] R
Surface gravity (log g)7.95 ± 0.02[2] cgs
Temperature5030 ± 120[2] K
Age5.19[3][note 3] Gyr
Other designations
WD 1334+039,[2][3] Wolf 489,[1] Gliese 518,[1] LHS 46,[2] LFT 1023,[1] LTT 13961,[1] NLTT 34618,[1] G 062-053,[5] G 62-53,[1] G 64-4,[1] EGGR 100,[1] 2MASS J13363181+0340458,[1] USNO-B1.0 0936-00229354[1]
Database references
SIMBADdata

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.

Distance

[edit]

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.

Wolf 489 parallax data
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]

Physical parameters

[edit]

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.

Notes

[edit]
  1. ^ From apparent magnitude and parallax.
  2. ^ From surface gravity and mass.
  3. ^ White dwarf cooling age, i. e. age as degenerate star (not including lifetime as main sequence star and as giant star)

See also

[edit]

References

[edit]
  1. ^ a b c d e f g h i j k l m n o p q r s t u "GJ 518 -- White Dwarf". Centre de Données astronomiques de Strasbourg. Retrieved 2011-11-02.
  2. ^ a b c d e f g h i j k l m Holberg, J. B.; Sion; Oswalt; McCook; Foran; Subasavage (2008). "A New Look at the Local White Dwarf Population". The Astronomical Journal. 135 (4): 1225–1238. Bibcode:2008AJ....135.1225H. doi:10.1088/0004-6256/135/4/1225. S2CID 122855486.
  3. ^ a b c d e Sion, Edward M.; Holberg; Oswalt; McCook; Wasatonic (2009). "The White Dwarfs within 20 Parsecs of the Sun: Kinematics and Statistics". The Astronomical Journal. 138 (6): 1681–1689. arXiv:0910.1288. Bibcode:2009AJ....138.1681S. doi:10.1088/0004-6256/138/6/1681. S2CID 119284418.
  4. ^ a b c d Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  5. ^ a b c d Yale Trigonometric Parallaxes, Fourth Edition (van Altena+ 1995)
  6. ^ Stars within 25 pc of the Sun (Woolley+ 1970)
  7. ^ Nearby Stars, Preliminary 3rd Version (Gliese+ 1991)