HD 35184

HD 35184 is a solitary star in the southern circumpolar constellation Mensa. It has an apparent magnitude of 6.50, which the maximum naked eye visibility. Located 375 light years away, it is receding with a heliocentric radial velocity of 13.6 km/s.

HD 35184

Observation data Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation	Mensa
Right ascension	05h 15m 24.8374s[1]
Declination	−73° 35′ 18.5123″[1]
Apparent magnitude (V)	6.50±0.01[2]
Characteristics
Spectral type	A6 V[3]
B−V color index	+0.15[4]
Astrometry
Radial velocity (Rv)	13.6±0.6[5] km/s
Proper motion (μ)	RA: −22.228 mas/yr[1] Dec.: +5.616 mas/yr[1]
Parallax (π)	8.7050 ± 0.0209 mas[1]
Distance	374.7 ± 0.9 ly (114.9 ± 0.3 pc)
Absolute magnitude (MV)	+1.26[4]
Details
Mass	2.15±0.04[6] M☉
Radius	2.8±0.1[7] R☉
Luminosity	24.5[8] L☉
Surface gravity (log g)	3.82+0.09 −0.07[7] cgs
Temperature	8,034[8] K
Metallicity [Fe/H]	−0.01[9] dex
Rotational velocity (v sin i)	92.4±2.9[10] km/s
Age	674[9] Myr
Other designations
22 G. Mensae, CPD−73°294, GC 6150, HD 35184, HIP 24507, SAO 256172
Database references
SIMBAD	data

HD 35184 has a stellar classification of A6 V, indicating that it is an ordinary A-type main-sequence star. At present it has 2.15 times the mass of the Sun^[6] and 2.8 times the radius of the Sun.^[7] It shines at 24.5 L_☉ from its photosphere at an effective temperature of 8,034 K,^[8] giving it a white hue. HD 35184 is 674 million years old – 79.6% through its main sequence lifetime^[6] – and spins with a projected rotational velocity of 92 km/s⁻¹.^[10]

References

1. 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.
2. Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H. ISSN 0004-6361.
3. Houk, N.; Cowley, A. P. (1975). University of Michigan Catalogue of two-dimensional spectral types for the HD stars. Volume I. Declinations -90_ to -53_ƒ0. Bibcode:1975mcts.book.....H.
4. Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. ISSN 1063-7737. S2CID 119257644.
5. Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. ISSN 1063-7737. S2CID 119231169.
6. Zorec, J.; Royer, F. (January 2012). "Rotational velocities of A-type stars. IV. Evolution of rotational velocities". Astronomy and Astrophysics. 537: A120. arXiv:1201.2052. Bibcode:2012A&A...537A.120Z. doi:10.1051/0004-6361/201117691. ISSN 0004-6361. S2CID 55586789.
7. Stassun, Keivan G.; et al. (9 September 2019). "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. ISSN 0004-6256.
8. McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (21 November 2012). "Fundamental parameters and infrared excesses of Hipparcos stars: Parameters and IR excesses from Hipparcos". Monthly Notices of the Royal Astronomical Society. 427 (1): 343–357. arXiv:1208.2037. Bibcode:2012MNRAS.427..343M. doi:10.1111/j.1365-2966.2012.21873.x. ISSN 0035-8711.
9. Gontcharov, G. A. (December 2012). "Dependence of kinematics on the age of stars in the solar neighborhood". Astronomy Letters. 38 (12): 771–782. arXiv:1606.08814. Bibcode:2012AstL...38..771G. doi:10.1134/S1063773712120031. ISSN 0320-0108. S2CID 255201789.
10. Ammler-von Eiff, M.; Reiners, A. (June 2012). "New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars?". Astronomy & Astrophysics. 542: A116. arXiv:1204.2459. Bibcode:2012A&A...542A.116A. doi:10.1051/0004-6361/201118724. ISSN 0004-6361.