55 Persei

55 Persei
	; 55 Persei in optical light
Observation data; Equinox J2000.0]] (ICRS)
Constellation	Perseus
Right ascension	04h 24m 29.1556s
Declination	+34° 07′ 50.728″
Apparent magnitude (V)	5.73
Characteristics
Spectral type	B8 V
B−V color index	−0.054±0.004
Astrometry
Radial velocity (Rv)	+8.5±3.5 km/s
Proper motion (μ)	RA: +21.092 mas/yr ; Dec.: −34.137 mas/yr
Parallax (π)	8.50 ± 0.38 mas
Distance	380 ± 20 ly ; (118 ± 5 pc)
Absolute magnitude (MV)	−0.39
Details
Mass	3.44±0.07 M☉
Radius	3.0 R☉
Luminosity	193+24; −21 L☉
Temperature	12,246±85 K
Rotational velocity (v sin i)	288 km/s
Age	197 Myr
Other designations
	55 Per, BD+33° 853, HD 27777, HIP 20579, HR 1377, SAO 57212
Database references
SIMBAD	data

Short description: Star in the constellation Perseus

55 Persei is a single,^[9] blue-white hued star in the northern constellation Perseus. It is faintly visible to the naked eye under good seeing conditions, having an apparent visual magnitude of 5.73.^[2] Based upon an annual parallax shift of 8.50±0.38 mas^[4] as seen from Earth's orbit, the star is located about 380 light years from the Sun. At that distance, the visual magnitude is diminished by an extinction of 0.39^[5] due to interstellar dust.

This is a B-type main-sequence star with a stellar classification of B8 V;^[2] a massive star that is generating energy through hydrogen fusion at its core. It has 3.44^[6] times the mass of the Sun and about 3^[7] times the Sun's radius. The star is about 197^[5] million years old and is spinning rapidly with a projected rotational velocity of 288 km/s.^[6] It is radiating roughly 193^[6] times the Sun's luminosity from its photosphere at an effective temperature of 12,246 K.^[6]

References

↑ ^1.0 ^1.1 ^1.2 ^1.3 Brown, A. G. A et al. (2016), "Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties", Astronomy and Astrophysics 595: A2, doi:10.1051/0004-6361/201629512, Bibcode: 2016A&A...595A...2G.
↑ ^2.0 ^2.1 ^2.2 ^2.3 ^2.4 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
↑ 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, doi:10.1051/0004-6361/201219219, A61, Bibcode: 2012A&A...546A..61D.
↑ ^4.0 ^4.1 van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, doi:10.1051/0004-6361:20078357, Bibcode: 2007A&A...474..653V.
↑ ^5.0 ^5.1 ^5.2 ^5.3 Gontcharov, G. A. (November 2012), "Spatial distribution and kinematics of OB stars", Astronomy Letters 38 (11): 694–706, doi:10.1134/S1063773712110035, Bibcode: 2012AstL...38..694G.
↑ ^6.0 ^6.1 ^6.2 ^6.3 ^6.4 ^6.5 ^6.6 ^6.7 Zorec, J.; Royer, F. (2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics 537: A120, doi:10.1051/0004-6361/201117691, Bibcode: 2012A&A...537A.120Z.
↑ ^7.0 ^7.1 Pasinetti Fracassini, L. E. et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics 367 (2): 521–524, doi:10.1051/0004-6361:20000451, Bibcode: 2001A&A...367..521P.
↑ "55 Per". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=55+Per.
↑ 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, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E.

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Original source: https://en.wikipedia.org/wiki/55 Persei. Read more

[Gaia2016-1] 1.0 ^1.1 ^1.2 ^1.3 Brown, A. G. A et al. (2016), "Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties", Astronomy and Astrophysics 595: A2, doi:10.1051/0004-6361/201629512, Bibcode: 2016A&A...595A...2G.

[Anderson2012-2] 2.0 ^2.1 ^2.2 ^2.3 ^2.4 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.

[deBruijne2012-3] Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics 546: 14, doi:10.1051/0004-6361/201219219, A61, Bibcode: 2012A&A...546A..61D.

[vanLeeuwen2007-4] 4.0 ^4.1 van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, doi:10.1051/0004-6361:20078357, Bibcode: 2007A&A...474..653V.

[Gontcharov2012-5] 5.0 ^5.1 ^5.2 ^5.3 Gontcharov, G. A. (November 2012), "Spatial distribution and kinematics of OB stars", Astronomy Letters 38 (11): 694–706, doi:10.1134/S1063773712110035, Bibcode: 2012AstL...38..694G.

[Zorec2012-6] 6.0 ^6.1 ^6.2 ^6.3 ^6.4 ^6.5 ^6.6 ^6.7 Zorec, J.; Royer, F. (2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics 537: A120, doi:10.1051/0004-6361/201117691, Bibcode: 2012A&A...537A.120Z.

[cadars2001-7] 7.0 ^7.1 Pasinetti Fracassini, L. E. et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics 367 (2): 521–524, doi:10.1051/0004-6361:20000451, Bibcode: 2001A&A...367..521P.

[SIMBAD-8] "55 Per". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=55+Per.

[Eggleton2008-9] 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, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E.

Observation data Equinox J2000.0]] (ICRS)
55 Persei in optical light
Constellation	Perseus
Right ascension	04^h 24^m 29.1556^s^[1]
Declination	+34° 07′ 50.728″^[1]
Apparent magnitude (V)	5.73^[2]
Characteristics
Spectral type	B8 V^[2]
B−V color index	−0.054±0.004^[2]
Astrometry

Radial velocity (R_v)	+8.5±3.5^[3] km/s
Proper motion (μ)	RA: +21.092 ^[1] mas/yr Dec.: −34.137 ^[1] mas/yr
Parallax (π)	8.50 ± 0.38^[4] mas
Distance	380 ± 20 ly (118 ± 5 pc)
Absolute magnitude (M_V)	−0.39^[5]

Details

Mass	3.44±0.07^[6] `M`_☉
Radius	3.0^[7] `R`_☉
Luminosity	193+24 −21^[6] `L`_☉
Temperature	12,246±85^[6] K
Rotational velocity (v sin i)	288^[6] km/s
Age	197^[5] Myr

Other designations
55 Per, BD+33° 853, HD 27777, HIP 20579, HR 1377, SAO 57212^[8]
Database references
SIMBAD	data

v t e Stars of Perseus
Bayer	α (Mirfak) β (Algol) γ δ ε ζ η (Miram) θ ι κ (Misam) λ μ ν ξ (Menkib) ο (Atik) π (Gorgonea Secunda) ρ (Gorgonea Tertia) σ τ φ ψ ω (Gorgonea Quarta) b
Flamsteed	1 2 3 4 (g) 5 7 (χ) 8 9 (i) 10 11 12 14 16 17 20 21 24 29 30 31 32 (l) 34 36 40 (o) 42 (n) 43 (A) 48 (c) 49 50 52 (f) 53 (d) 54 55 56 57 (m) 58 (e) 59 1 Aur
Variable	S T U V X Z RS RT RV RW RY ST SU SV TZ UV UX UY VX XX XY XZ YZ AB AG AR AS AW AX BM DM DY FO GK IK IP IQ IU IW IX IZ KP KS KT KW LX V351 V356 V357 V361 V376 V380 V386 V396 V392 V400 V423 V432 V440 V459 V461 V471 V472 V473 V480 V490 V492 V493 V505 V509 V520 (61 And) V521 V545 V551 V572 V573 V575 V576 V621 V718
HR	470 526 529 538 540 621 641 787 792 810 820 831 842 846 849 864 865 876 885 886 890 894 918 (k) 920 923 930 949 950 956 964 966 969 973 975 979 986 991 1001 1019 1034 1037 1041 1047 1051 1056 1059 1074 1097 1113 1127 1130 1133 1141 1160 1164 1176 1191 1197 1198 1207 1215 1226 1234 1286 1301 1330 1333 1337 1344 1371 1390 1419 1424 1482 1489 1493 1500 1514
HD	13519 14433 14434 16691 16760 17092 17245 17605 21684 22781 23301 23596 25329 26702 29587
Other	BD+31 643 BD+48 740 G 38-29 G 95-57 GD 61 GRO J0422+32 HAT-P-15 HAT-P-29 IRAS 04296+3429 L1448-IRS2E LkHα 101 LRLL 54361 NGC 1333 13 NGC 1333 IRAS 2A NGC 1333 IRAS 4A NGC 1333 IRAS 4B NSV 1436 PSR B0355+54 PSR J0357+3205
List