Upsilon1 Cancri

Upsilon¹ Cancri
Observation data; Epoch J2000.0 Equinox J2000.0 (ICRS)
Constellation	Cancer
Right ascension	08h 31m 30.519s
Declination	+24° 04′ 51.99″
Apparent magnitude (V)	+5.694
Characteristics
Spectral type	F0 IIIn
B−V color index	+0.309
Astrometry
Radial velocity (Rv)	+19.0±4.3 km/s
Proper motion (μ)	RA: −80.791 mas/yr ; Dec.: −44.858 mas/yr
Parallax (π)	13.6180±0.0415 mas
Distance	239.5 ± 0.7 ly ; (73.4 ± 0.2 pc)
Absolute magnitude (MV)	+1.29
Details
Mass	1.47 M☉
Radius	3.20±0.02 R☉
Luminosity	25 L☉
Surface gravity (log g)	3.51 cgs
Temperature	7,240±246 K
Rotational velocity (v sin i)	109.2 km/s
Age	570 Myr
Other designations
	υ1 Cnc, 30 Cancri, BD+24°1940, FK5 2666, HD 72041, HIP 41816, HR 3355, SAO 80229
Database references
SIMBAD	data

Upsilon¹ Cancri is a solitary,^[4] yellow-white-hued star in the constellation Cancer. Its name is a Bayer designation that is Latinized from υ¹ Cancri, and abbreviated Upsilon¹ Cnc or υ¹ Cnc. This star is faintly visible to the naked eye, having an apparent visual magnitude of +5.7.^[3] Based upon an annual parallax shift of 13.62 mas as seen from Earth,^[2] this system is 240 light-years (73 pc) distant from the Sun. It is drifting further away with a line of sight velocity of +19 km/s.^[5]

This object has a stellar classification of F0 IIIn, presenting as an F-type giant star.^[4] The 'n' suffix indicates "nebulous" absorption lines due to rapid rotation, and it shows a relatively high projected rotational velocity of 109.2 km/s.^[7] It is a variable star of unknown type that changes brightness with an amplitude of 0.05 magnitude.^[9] The star is about 570^[6] million years old and is spinning rapidly with a projected rotational velocity of 109.2 km/s.^[7] It has an estimated mass of 1.47^[6] times that of the Sun and 3.2 times the Sun's radius.^[2] On average, it is radiating 25^[1] times the Sun's luminosity from its photosphere at an effective temperature of 7,240 K.^[6]

References

^ ^a ^b ^c ^d 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. XHIP record for this object at VizieR.
^ ^a ^b ^c ^d ^e ^f ^g Vallenari, A.; et al. (Gaia collaboration) (2023), "Gaia Data Release 3. Summary of the content and survey properties", Astronomy and Astrophysics, 674: A1, arXiv:2208.00211, Bibcode:2023A&A...674A...1G, doi:10.1051/0004-6361/202243940, S2CID 244398875. Gaia DR3 record for this source at VizieR.
^ ^a ^b ^c Høg, E.; et al. (March 2000), "The Tycho-2 catalogue of the 2.5 million brightest stars", Astronomy and Astrophysics, 355: L27 – L30, Bibcode:2000A&A...355L..27H, doi:10.1888/0333750888/2862.
^ ^a ^b ^c Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.
^ ^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 ^c ^d ^e ^f David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", The Astrophysical Journal, 804 (2): 146, arXiv:1501.03154, Bibcode:2015ApJ...804..146D, doi:10.1088/0004-637X/804/2/146, S2CID 33401607.
^ ^a ^b ^c ^d Schröder, C.; et al. (January 2009), "Ca II HK emission in rapidly rotating stars. Evidence for an onset of the solar-type dynamo", Astronomy and Astrophysics, 493 (3): 1099–1107, Bibcode:2009A&A...493.1099S, doi:10.1051/0004-6361:200810377
^ "ups01 Cnc", SIMBAD, Centre de données astronomiques de Strasbourg, retrieved 2017-06-10.
^ Adelman, S. J. (October 2000), "On the Variability of A3-F0 Luminosity Class III-V Stars", Information Bulletin on Variable Stars, 4969 (4969): 1, Bibcode:2000IBVS.4969....1A.

[Anderson2012-1] 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. XHIP record for this object at VizieR.

[GaiaDR3-2] ^ ^a ^b ^c ^d ^e ^f ^g Vallenari, A.; et al. (Gaia collaboration) (2023), "Gaia Data Release 3. Summary of the content and survey properties", Astronomy and Astrophysics, 674: A1, arXiv:2208.00211, Bibcode:2023A&A...674A...1G, doi:10.1051/0004-6361/202243940, S2CID 244398875. Gaia DR3 record for this source at VizieR.

[Hog2000-3] Høg, E.; et al. (March 2000), "The Tycho-2 catalogue of the 2.5 million brightest stars", Astronomy and Astrophysics, 355: L27 – L30, Bibcode:2000A&A...355L..27H, doi:10.1888/0333750888/2862.

[Eggleton2008-4] Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.

[deBruijne2012-5] 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.

[David2015-6] ^ ^a ^b ^c ^d ^e ^f David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", The Astrophysical Journal, 804 (2): 146, arXiv:1501.03154, Bibcode:2015ApJ...804..146D, doi:10.1088/0004-637X/804/2/146, S2CID 33401607.

[Schroeder2009-7] Schröder, C.; et al. (January 2009), "Ca II HK emission in rapidly rotating stars. Evidence for an onset of the solar-type dynamo", Astronomy and Astrophysics, 493 (3): 1099–1107, Bibcode:2009A&A...493.1099S, doi:10.1051/0004-6361:200810377

[SIMBAD-8] "ups01 Cnc", SIMBAD, Centre de données astronomiques de Strasbourg, retrieved 2017-06-10.

[Adelman2000-9] Adelman, S. J. (October 2000), "On the Variability of A3-F0 Luminosity Class III-V Stars", Information Bulletin on Variable Stars, 4969 (4969): 1, Bibcode:2000IBVS.4969....1A.

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Upsilon1 Cancri

References

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