HD 3346

HD 3346
Observation data; Epoch J2000 Equinox J2000
Constellation	Andromeda
Right ascension	00h 36m 46.441s
Declination	+44° 29′ 18.91″
Apparent magnitude (V)	5.164
Characteristics
Spectral type	K5III
U−B color index	1.97
B−V color index	1.6
Variable type	SRs
Astrometry
Radial velocity (Rv)	-32.8 km/s
Proper motion (μ)	RA: -36.31 ± 0.21 mas/yr ; Dec.: 31.96 ± 0.18 mas/yr
Parallax (π)	5.29 ± 0.30 mas
Distance	620 ± 30 ly ; (190 ± 10 pc)
Other designations
	V428 Andromedae, HD 3346, SAO 36509, BD+43°113, HIP 2900, HR 152
Database references
SIMBAD	data

HD 3346, also known as V428 Andromedae, is an orange giant star approximately 620 light-years away^[1] in the constellation of Andromeda.

Possible planetary system

In 1996 it was announced that the variations in radial velocity of this star were larger than expected. A planetary system was proposed to explain this variation.^[3]^[4]

The HD 3346 planetary system
Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b (unconfirmed)	10 M_J	0.3	30.0	0	—	—
c (unconfirmed)	60 M_J	2.5	650	0.00	—	—

References

^ ^a ^b ^c ^d ^e ^f van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.Vizier catalog entry
^ Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/gcvs. Originally published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S.
^ Noyes, R.; et al. (1996). "HD 3346". International Astronomical Union Circular (6316): 1.
^ 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.

The paper, HD 3346, 1996.

External links

"HD 3346 Planetary System". Interstellar Card. Archived from the original on 2007-08-08. Retrieved 2008-06-10.

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This extrasolar-planet-related article is a stub. You can help Wikipedia by expanding it.

[van_Leeuwen2007-1] ^ ^a ^b ^c ^d ^e ^f van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.Vizier catalog entry

[gcvs-2] Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/gcvs. Originally published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S.

[3] Noyes, R.; et al. (1996). "HD 3346". International Astronomical Union Circular (6316): 1.

[4] 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.

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