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Evolved red giant star in the constellation Virgo
ET Virginis is a single,
[13] red-hued
star in the equatorial
constellation of
Virgo. It can be viewed with the naked eye, having an
apparent visual magnitude of 4.91.
[3] Based upon an annual
parallax shift of 5.9
mas,
[2] it is located 560
light years away. It is moving further from the Earth with a heliocentric
radial velocity of +18.6 km/s,
[6] having come within 177 ly of the Sun around 6.3 million years ago.
[7]
ET Vir Pulsation Cycles
[1]
Period (Days)
|
22.6 |
23.8 |
36.4 |
37.6 |
39.8 |
48.8 |
259.1
|
Amplitude (mag.)
|
0.021 |
0.023 |
0.018 |
0.027 |
0.021 |
0.019 |
0.032
|
This is an
evolved
red giant star with a
stellar classification of M2 IIIa.
[4] It is a
semiregular variable star of subtype SRB with a magnitude that ranges from a high of 4.80 down to 5.00.
[5] The measured
angular diameter of this star, after correcting for limb darkening, is 4.79±0.34 mas.
[14] At its estimated distance, this yields a physical size of 83 times the
radius of the Sun.
References
- ^
a
b Tabur, V.; et al. (December 2009), "Long-term photometry and periods for 261 nearby pulsating M giants",
Monthly Notices of the Royal Astronomical Society, 400 (4): 1945–1961,
arXiv:
0908.3228,
Bibcode:
2009MNRAS.400.1945T,
doi:
10.1111/j.1365-2966.2009.15588.x,
S2CID
15358380.
- ^
a
b
c
d
e
f
g
h
Brown, A. G. A.; et al. (Gaia collaboration) (August 2018).
"Gaia Data Release 2: Summary of the contents and survey properties".
Astronomy & Astrophysics. 616. A1.
arXiv:
1804.09365.
Bibcode:
2018A&A...616A...1G.
doi:
10.1051/0004-6361/201833051.
Gaia DR2 record for this source at
VizieR.
- ^
a
b
c Soubiran, C.; et al. (June 2010), "The PASTEL catalogue of stellar parameters", Astronomy and Astrophysics, 515: A111,
arXiv:
1004.1069,
Bibcode:
2010A&A...515A.111S,
doi:
10.1051/0004-6361/201014247,
S2CID
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- ^
a
b Keenan, Philip C.; McNeil, Raymond C. (1989), "The Perkins catalog of revised MK types for the cooler stars", Astrophysical Journal Supplement Series, 71: 245,
Bibcode:
1989ApJS...71..245K,
doi:
10.1086/191373,
S2CID
123149047.
- ^
a
b Samus', N. N; Kazarovets, E. V; Durlevich, O. V; Kireeva, N. N; Pastukhova, E. N (2017), "General catalogue of variable stars: Version GCVS 5.1", Astronomy Reports, 61 (1): 80–88,
Bibcode:
2017ARep...61...80S,
doi:
10.1134/S1063772917010085,
S2CID
125853869.
- ^
a
b de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: 14,
arXiv:
1208.3048,
Bibcode:
2012A&A...546A..61D,
doi:
10.1051/0004-6361/201219219,
S2CID
59451347, A61.
- ^
a
b Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331,
arXiv:
1108.4971,
Bibcode:
2012AstL...38..331A,
doi:
10.1134/S1063773712050015,
S2CID
119257644.
-
^ Kervella, Pierre; Arenou, Frédéric; Thévenin, Frédéric (2022), "Stellar and substellar companions from Gaia EDR3", Astronomy & Astrophysics, 657: A7,
arXiv:
2109.10912,
Bibcode:
2022A&A...657A...7K,
doi:
10.1051/0004-6361/202142146,
S2CID
237605138.
-
^ Stassun, Keivan G.; et al. (2019-10-01), "The Revised TESS Input Catalog and Candidate Target List", The Astronomical Journal, 158 (4): 138,
arXiv:
1905.10694,
Bibcode:
2019AJ....158..138S,
doi:
10.3847/1538-3881/ab3467,
hdl:
1721.1/124721,
ISSN
0004-6256,
S2CID
166227927.
-
^ Gáspár, András; et al. (August 2016), "The Correlation between Metallicity and Debris Disk Mass", The Astrophysical Journal, 826 (2): 14,
arXiv:
1604.07403,
Bibcode:
2016ApJ...826..171G,
doi:
10.3847/0004-637X/826/2/171,
S2CID
119241004, 171.
-
^ Zamanov, R. K.; et al. (October 2008), "Rotational velocities of the giants in symbiotic stars - III. Evidence of fast rotation in S-type symbiotics", Monthly Notices of the Royal Astronomical Society, 390 (1): 377–382,
arXiv:
0807.3817,
Bibcode:
2008MNRAS.390..377Z,
doi:
10.1111/j.1365-2966.2008.13751.x,
S2CID
118697261.
-
^
"HD 123934".
SIMBAD.
Centre de données astronomiques de Strasbourg. Retrieved 16 August 2018.
-
^ Eggleton, P. P.; Tokovinin, A. A. (2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869,
arXiv:
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Bibcode:
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doi:
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S2CID
14878976.
-
^ Richichi, A.; et al. (February 2005), "CHARM2: An updated Catalog of High Angular Resolution Measurements", Astronomy and Astrophysics, 431 (2): 773–777,
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