HD 3346

Last updated
HD 3346
Observation data
Epoch J2000       Equinox J2000
Constellation Andromeda
Right ascension 00h 36m 46.44107s [1]
Declination +44° 29′ 18.9202″ [1]
Apparent magnitude  (V)5.13 – 5.19 [2]
Characteristics
Spectral type K6 IIIa [3] (K5 - M0 III [2] )
B−V color index 1.587±0.005 [4]
Variable type SRS [2]
Astrometry
Radial velocity (Rv)−33.46±0.22 [1]  km/s
Proper motion (μ)RA: −37.121  mas/yr [1]
Dec.: +32.293  mas/yr [1]
Parallax (π)4.7240 ± 0.0894  mas [1]
Distance 690 ± 10  ly
(212 ± 4  pc)
Absolute magnitude  (MV)−1.23 [4]
Orbit [5]
Period (P)576.2±3.5 d
Eccentricity (e)0.30±0.06
Periastron epoch (T)43787±22 MJD
Argument of periastron (ω)
(secondary)		279±15°
Semi-amplitude (K1)
(primary)		0.69±0.08 km/s
Details
Radius 48 [6]   R☉
Luminosity 817.99 [7] or 1001.25 [4]   L☉
Surface gravity (log g)1.19±0.16 [8]   cgs
Temperature 3909±170 [8]   K
Metallicity [Fe/H]−0.00±0.10 [8]   dex
Other designations
V428 Andromedae, BD+43°113, HD  3346, HIP  2900, HR  152, SAO  36509 [9]
Database references
SIMBAD data

HD 3346, also known as V428 Andromedae, is a binary star [10] system in the northern constellation of Andromeda. It is a dim star but visible to the naked eye under suitable viewing conditions, having an apparent visual magnitude of 5.14. [4] The distance to HD 3346 can be determined from its annual parallax shift of 4.72  mas . [1] This yields a range of about 690 light-years (210 parsecs ). At that distance the brightness of the system is diminished by an extinction of 0.16 magnitude due to interstellar dust. [11] It is moving closer to the Earth with a heliocentric radial velocity of −33 km/s. [11]

Contents

Binary system

This is a single-lined spectroscopic binary system with an orbital period of 576 days and an eccentricity of 0.3. The a sin i value for the primary is 5.1 ± 0.6  Gm (0.0341 ± 0.0040  AU ), where a is the semimajor axis and i is the (unknown) orbital inclination. The provides a minimum value for the actual semimajor axis. [5]

The visible component is a red giant star and has been defined as a standard star for the stellar classification of K6 IIIa. [3] Prior to that there had been no spectral standard for K6 giants and HD 3346 had been classified between K5 III and M0 III. [12]

In 1996 it was announced that the variations in radial velocity of this star were larger than expected. Two orbiting companions were proposed to explain this variation, the one known since 1985 with a period of about 650 days and a minimum mass of about 60  MJ, and a second one with a period of about 14-40 days and a minimum mass of about 10 MJ. [13] [14] The existence of this second, possibly planetary companion was never confirmed.

Variability

V428 Andromedae is the variable star designation for HD 3346. It is a short-period semi-regular variable (type SRS), [2] also called an ultra-small-amplitude pulsating red giant. [15] It has an amplitude of only 0.065 magnitudes. [15] The main pulsation period is 11.5 days, but other periods of 11, 15, and 22 days have been detected. [16] [15]

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HD 91942 is a single variable star in the constellation Carina. It has the Bayer designation r Carinae, while HD 91942 is the identifier from the Henry Draper catalogue. This orange-hued object is visible to the naked eye with an apparent visual magnitude of 4.45. Based on parallax measurements, it is located at a distance of approximately 1,180 light years from the Sun. The star has an absolute magnitude of −3.77, and is drifting further away with a radial velocity of +9.9 km/s.

<span class="mw-page-title-main">V520 Carinae</span> Star in the constellation Carina

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Pi2 Cygni, Latinized from π2 Cygni, is a triple star system in the northern constellation of Cygnus. It is visible to the naked eye about 2.5° east-northeast of the open cluster M39, having an apparent visual magnitude of 4.24. Based upon an annual parallax shift of 2.95 mas, it is located at a distance of roughly 1,100 light years from the Sun.

HD 14622 is a single star in the northern constellation of Andromeda. It is dimly visible to the naked eye under good seeing conditions, having an apparent visual magnitude of 5.81. Based upon an annual parallax shift of 20.9 mas, it is located 156 light years away. The star is moving closer to the Earth with a heliocentric radial velocity of −35 km/s, and is predicted to come within 96 light-years in around 812,000 years.

<span class="mw-page-title-main">HD 27245</span> Star in the constellation Camelopardalis

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HD 102350 is a single star in the constellation Centaurus. It has a yellow hue and is visible to the naked eye with an apparent visual magnitude of 4.11. The distance to this star is approximately 390 light years based on parallax, but it is drifting closer with a radial velocity of −3 km/s. It has an absolute magnitude of −1.51.

<span class="mw-page-title-main">54 Eridani</span> Star in the constellation Eridanus

54 Eridani is a suspected astrometric binary star system located around 400 light years from the Sun in the equatorial constellation of Eridanus. It is visible to the naked eye as a faint, reddish hued star with a baseline apparent visual magnitude of 4.32. The object is moving closer to the Earth with a heliocentric radial velocity of −33 km/s.

<span class="mw-page-title-main">104 Herculis</span> Star in the constellation Hercules


104 Herculis is a solitary variable star located around 560 light years away from the Sun in the northern constellation of Hercules. It has the variable star designation V669 Herculis and the Bayer designation A Herculis, while 104 Herculis is the Flamsteed designation. This object is visible to the naked eye as a dim, red-hued point of light with a baseline apparent visual magnitude of 4.96. It is moving closer to the Earth with a heliocentric radial velocity of −1.2 km/s.

<span class="mw-page-title-main">28 Monocerotis</span> Star in the constellation Monoceros

28 Monocerotis is a single star in the equatorial constellation of Monoceros. It has an orange-hue and is faintly visible to the naked eye with an apparent visual magnitude of 4.69. The distance to this star is approximately 450 light years based on parallax, and it has an absolute magnitude of −1.00. The star is drifting further away from the Sun with a radial velocity of +26.7 km/s.

HD 115211 is a single star in the southern constellation of Musca. It has an orange hue and is faintly visible to the naked eye with an apparent visual magnitude of 4.86. Its distance from Earth is approximately 1,370 light years based on parallax, and it is drifting closer to the Sun with a radial velocity of −10 km/s. It has an absolute magnitude of −2.94.

<span class="mw-page-title-main">ET Virginis</span> Evolved red giant star in the constellation Virgo

ET Virginis is a single, 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. Based upon an annual parallax shift of 5.9 mas, it is located 560 light years away. It is moving further from the Earth with a heliocentric radial velocity of +18.6 km/s, having come within 177 ly of the Sun around 6.3 million years ago.

<span class="mw-page-title-main">HD 203030</span> K-type main sequence star in the constellation Vulpecula

HD 203030 is a single, yellow-orange hued star with a sub-stellar companion in the northern constellation of Vulpecula. The designation HD 203030 is from the Henry Draper Catalogue, which is based on spectral classifications made between 1911 and 1915 by Annie Jump Cannon and her co-workers, and was published between 1918 and 1924. This star is invisible to the naked eye, having an apparent visual magnitude of 8.45. It is located at a distance of 128 light years from the Sun based on parallax, and is drifting closer with a radial velocity of −17 km/s.

HD 53501, is a solitary star in the southern circumpolar constellation Volans. It has an apparent magnitude of 5.18, allowing it to be seen with the naked eye under ideal conditions. The object is located at a distance of 308 light years but is receding with a heliocentric radial velocity of 39 km/s.

HD 200044 is a solitary star in the equatorial constellation Delphinus. It has an apparent magnitude of 5.7, allowing it to be faintly seen with the naked eye. The object is located 598 light years away, but is approaching the Solar System with a heliocentric radial velocity of −15.07 km/s.

HD 1032 is a solitary star in the southern circumpolar constellation Octans. It is faintly visible to the naked eye with an apparent magnitude of 5.77 and is estimated to be 850 light years away from the Solar System based on parallax measure. However, it is receding with a heliocentric radial velocity of 4 km/s.

<span class="mw-page-title-main">AF Columbae</span> Star in the constellation of Columba

AF Columbae, also known as HD 42682, is a solitary, red hued variable star located in the southern constellation Columba, the dove. It has an apparent magnitude that fluctuates between 5.6 and 5.71. Nevertheless, it is faintly visible to the naked eye. Parallax measurements from the Gaia spacecraft place the star relatively far at a distance of 820 light years. However, it is approaching the Solar System with a poorly constrained radial velocity of −19 km/s.

References

  1. 1 2 3 4 5 6 7 Vallenari, A.; et al. (Gaia Collaboration) (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics . arXiv: 2208.00211 . doi: 10.1051/0004-6361/202243940 . Gaia DR3 record for this source at VizieR.
  2. 1 2 3 4 N. N. Samus; O. V. Durlevich; et al. "V428 And database entry". Combined General Catalog of Variable Stars (2017 ed.). CDS . Retrieved 2018-11-12.
  3. 1 2 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.
  4. 1 2 3 4 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.
  5. 1 2 McClure, R. D.; et al. (August 1985), "A spectroscopic orbit for HR 152", Publications of the Astronomical Society of the Pacific, 97: 740–744, Bibcode:1985PASP...97..740M, doi:10.1086/131600, S2CID   121308350
  6. ↑ Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics", Astronomy and Astrophysics, 367 (2): 521–524, arXiv: astro-ph/0012289 , Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451, S2CID   425754
  7. ↑ McDonald, I.; et al. (2012). "Fundamental parameters and infrared excesses of Hipparcos stars". Monthly Notices of the Royal Astronomical Society. 427 (1): 343. arXiv: 1208.2037 . Bibcode:2012MNRAS.427..343M. doi:10.1111/j.1365-2966.2012.21873.x. S2CID   118665352.
  8. 1 2 3 Röck, B.; Vazdekis, A.; Peletier, R. F.; Knapen, J. H.; Falcón-Barroso, J. (2015). "Stellar population synthesis models between 2.5 and 5 μm based on the empirical IRTF stellar library". Monthly Notices of the Royal Astronomical Society. 449 (3): 2853–2874. arXiv: 1505.01837 . Bibcode:2015MNRAS.449.2853R. doi: 10.1093/mnras/stv503 .
  9. ↑ "HD 3167". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved October 6, 2018.
  10. ↑ 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: 0806.2878 . Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x. S2CID   14878976.
  11. 1 2 Famaey, B.; et al. (January 2005). "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters". Astronomy and Astrophysics. 430 (1): 165–186. arXiv: astro-ph/0409579 . Bibcode:2005A&A...430..165F. doi:10.1051/0004-6361:20041272. S2CID   17804304.
  12. ↑ Keenan, P. C.; Pitts, R. E. (1980). "Revised MK spectral types for G, K ANS M stars". The Astrophysical Journal Supplement Series. 42: 541. Bibcode:1980ApJS...42..541K. doi:10.1086/190662.
  13. ↑ Noyes, R.; et al. (1996). "HD 3346". IAU Circular. 6316 (6316): 1. Bibcode:1996IAUC.6316....1N.
  14. ↑ Bell, George H. (2001-04-05). "The Search for the Extrasolar Planets: A Brief History of the Search, the Findings and the Future Implications". Arizona State University . Retrieved 2008-07-16.
  15. 1 2 3 Percy, John R.; et al. (December 2001), "Periods of Eleven K5-M0 Pulsating Red Giants", Information Bulletin on Variable Stars, 5209: 1, Bibcode:2001IBVS.5209....1P
  16. ↑ Glass, I. S.; Van Leeuwen, F. (2007). "Semiregular variables in the solar neighbourhood". Monthly Notices of the Royal Astronomical Society. 378 (4): 1543–1549. arXiv: 0704.3150 . Bibcode:2007MNRAS.378.1543G. doi:10.1111/j.1365-2966.2007.11903.x. S2CID   14332208.
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