55 Persei

Short description: Star in the constellation Perseus

55 Persei

55 Persei in optical light

Observation data
Equinox J2000.0]] (ICRS)
Constellation | Perseus
Right ascension |  04h 24m 29.1556s[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 (Rv)| +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 (MV)| −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

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. ↑ 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. ↑ 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.
3. ↑ 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. ↑ 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. ↑ 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. ↑ 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. ↑ 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.
8. ↑ "55 Per". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=55+Per.
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.

* 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

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