HD 16955

HD 16955
Observation data Epoch J2000 Equinox J2000
HD 16955
Constellation	Aries
Right ascension	02^h 43^m 51.2441^s
Declination	+25° 38′ 18.0493″
Apparent magnitude (V)	6.36
Characteristics
Spectral type	A3V
Astrometry

Radial velocity (R_v)	-10.30 ± 3.1 km/s
Proper motion (μ)	RA: -4.98 ± 0.70^[1] mas/yr Dec.: 6.04 ± 0.52^[1] mas/yr
Parallax (π)	9.59 ± 0.76^[1] mas
Distance	340 ± 30 ly (104 ± 8 pc)

Details

Mass	3,1 M_☉
Radius	2,1 R_☉
Luminosity	40 L_☉
Temperature	7,500–10,000 K

Other designations
HD 16955, HIC 12744, SAO 75539, BD+25° 441, HIP 12744, HR 803.
Database references
SIMBAD	data
Data sources:
Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.)
Database references
SIMBAD	data

HD 16955, also known as HR 803, is a double or multiple star.

References

1 2 3 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

Components

NAME	Right ascension	Declination	Apparent magnitude (V)	Spectral type	Database references
ADS 2082 C (BD+25 441C)	02^h 43^m 54.8^s	+25° 38' 16	12.1		Simbad

Aries constellation

Stars (list)

Bayer	α (Hamal) β (Sheratan) γ (Mesarthim) δ (Botein) ε ζ η θ ι κ λ μ ν ξ ο π ρ¹ ρ² ρ³ σ τ¹ τ²

Flamsteed	1 4 7 10 11 14 15 16 19 20 21 23 26 27 29 30 31 33 35 36 38 39 40 41 (Bharani) 47 49 50 51 52 53 54 55 56 59 60 62 64 65 66 54 Cet 85 Cet

Variable	R X RV RW RX SS TT UX VW VY VZ (16 Tri) WX XY

HR	577 578 601 609 624 644 676 711 723 728 803 856 902 916 924 931 945 946 948 952 971 999

HD	12661 19445 19549 20367

Other	BD +20°307 HAT-P-25 HIP 14810 L 1159-16 L1448 IRS 3 L1455 FIR LkHα 264 PSR B0301+19 Teegarden's star WASP-11

Nebulae

Star-forming	L1448 L1455 MBM 12

Galaxies

NGC	671 673 675 677 678 680 683 691 694 695 697 711 716 719 722 765 770 772 774 776 781 786 792 794 803 810 817 820 821 870 871 876 877 882 900 901 903 904 915 916 918 919 924 927 928 932 935 938 962 972 976 984 990 992 1012 1024 1028 1029 1030 1036 1054 1056 1088 1109 1111 1112 1115 1116 1117N 1117S 1127 1134 1156 1166 1168 1236

Other	AO 0235+164 3C 79 CTA 21 1ES 0229+200 IC 1801 IC 1854 PKS 0201+113 PKS 0202+149 QSO J0237+2848 RBS 0413 Segue 2 UGC 2140

Galaxy
clusters

Abell 399
Abell 401

Other

GRB 040924
GRB 060218

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