Wolf 489: Difference between revisions

Wolf 489
Observation data; Epoch J2000 Equinox J2000
Constellation	Virgo
Right ascension	13h 36m 31.81s
Declination	+03° 40′ 45.″
Apparent magnitude (V)	14.66
Characteristics
Spectral type	DZ10.0
Apparent magnitude (B)	15.59
Apparent magnitude (V)	14.63
Apparent magnitude (R)	14.0
Apparent magnitude (I)	14.1
Apparent magnitude (J)	13.06
Apparent magnitude (H)	12.82
Apparent magnitude (K)	12.69
Astrometry
Proper motion (μ)	RA: -3735.839 mas/yr ; Dec.: -1113.581 mas/yr
Parallax (π)	119.7566 ± 0.0304 mas
Distance	27.235 ± 0.007 ly ; (8.350 ± 0.002 pc)
Absolute magnitude (MV)	15.08
Details
Mass	0.55 ± 0.03 M☉
Radius	0.013 R☉
Surface gravity (log g)	7.95 ± 0.02 cgs
Temperature	5030 ± 120 K
Age	5.19 Gyr
Other designations
	WD 1334+039, Wolf 489, Gliese 518, LHS 46, LFT 1023, LTT 13961, NLTT 34618, G 062-053, G 62-53, G 64-4, EGGR 100, 2MASS J13363181+0340458, USNO-B1.0 0936-00229354
Database references
SIMBAD	data

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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.

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 10^{7.95 ± 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]

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

References[edit]

^ ^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.
^ ^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.
^ ^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.
^ ^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.
^ ^a ^b ^c ^d Yale Trigonometric Parallaxes, Fourth Edition (van Altena+ 1995)
^ Stars within 25 pc of the Sun (Woolley+ 1970)
^ Nearby Stars, Preliminary 3rd Version (Gliese+ 1991)

[note_1-6] From apparent magnitude and parallax.

[note_2-7] From surface gravity and mass.

[note_3-8] White dwarf cooling age, i. e. age as degenerate star (not including lifetime as main sequence star and as giant star)

[Simbad-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.

[Holberg2008-2] ^ ^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.

[Sion2009-3] 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.

[EDR3-4] 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.

[Yale-5] Yale Trigonometric Parallaxes, Fourth Edition (van Altena+ 1995)

[Wo-9] Stars within 25 pc of the Sun (Woolley+ 1970)

[GJ-10] Nearby Stars, Preliminary 3rd Version (Gliese+ 1991)

[1]

[2]

[3]

[4]

[5]

[note 1]

[note 2]

[note 3]

[6]

[7]

@@ Line 1: / Line 1: @@
+{{Short description|Star in the constellation Virgo}}
 {{Sky|13|36|31.81|+|03|40|45.9|26.9}}
 {{Starbox begin
-|name=Wolf 489 aka big wolf 489}}
+|name=Wolf 489}}
 {{Starbox observe
 |epoch=[[J2000]]<ref name="Simbad">{{cite web
@@ Line 7: / Line 8: @@
  | title =GJ 518 -- White Dwarf
  | publisher=[[Centre de Données astronomiques de Strasbourg]]
- | accessdate=2011-11-02}}</ref>
+ | access-date=2011-11-02}}</ref>
 |equinox=[[J2000]]<ref name="Simbad"/>
 |constell=[[Virgo (constellation)|Virgo]]
@@ Line 16: / Line 17: @@
  | last=Holberg |first=J. B.
  |author2=Sion |author3=Oswalt |author4=McCook |author5=Foran |author6= Subasavage
+ |title=A New Look at the Local White Dwarf Population
  | year=2008
- | title=A NEW LOOK AT THE LOCAL WHITE DWARF POPULATION
  | journal=[[The Astronomical Journal]]
- | volume=135 | pages=1225–1238
+ | volume=135 |issue=4
+ | pages=1225–1238
  | bibcode=2008AJ....135.1225H
  | 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
 |class=DZ10.0<ref name="Holberg2008"/><ref name="Sion2009">
@@ Line 28: / Line 31: @@
  | last=Sion |first=Edward M.
   |author2=Holberg |author3=Oswalt |author4=McCook |author5= Wasatonic
+ |title=The White Dwarfs within 20 Parsecs of the Sun: Kinematics and Statistics
  | year=2009
- | title=THE WHITE DWARFS WITHIN 20 PARSECS OF THE SUN: KINEMATICS AND STATISTICS
  | journal=[[The Astronomical Journal]]
- | volume=138 | pages=1681–1689
+ | volume=138 |issue=6
+ | pages=1681–1689
  | bibcode=2009AJ....138.1681S
  | doi=10.1088/0004-6256/138/6/1681
-|arxiv = 0910.1288 }}</ref>
+|arxiv = 0910.1288 |s2cid=119284418
+ }}</ref>
 |appmag_1_passband=B
 |appmag_1=15.59<ref name="Simbad"/>
@@ Line 50: / Line 55: @@
 |appmag_7=12.69<ref name="Simbad"/>}}
 {{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
 | mass=0.55 ± 0.03<ref name="Holberg2008"/>
@@ Line 73: / Line 78: @@
 ==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"
@@ Line 85: / Line 90: @@
 |-
 | 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==
-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==
 <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.
 ==See also==
@@ Line 101: / Line 107: @@
 ==References==
-{{reflist|colwidth=30em}}
+{{reflist}}
 {{Stars of Virgo}}
+{{DEFAULTSORT:Wolf 489}}
 [[Category:White dwarfs]]
 [[Category:Virgo (constellation)]]
 [[Category:Gliese and GJ objects|0518]]
-[[Category:2MASS objects]]
+[[Category:2MASS objects|J13363181+0340458]]

Observation data Epoch J2000^[1] Equinox J2000^[1]
Constellation	Virgo
Right ascension	13^h 36^m 31.81^s^[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]
Distance	27.235 ± 0.007 ly (8.350 ± 0.002 pc)
Absolute magnitude (M_V)	15.08^[2]^[5]^{[note 1]}

Details

Mass	0.55 ± 0.03^[2] `M`_☉
Radius	0.013^[2]^{[note 2]} `R`_☉
Surface gravity (log g)	7.95 ± 0.02^[2] cgs
Temperature	5030 ± 120^[2] K
Age	5.19^[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
SIMBAD	data

Latest revision as of 07:48, 27 February 2023

Distance[edit]

Physical parameters[edit]

Notes[edit]

See also[edit]

References[edit]