49 Persei

Short description: Star in the constellation Perseus

49 Persei  Observation data
Equinox J2000.0]] (ICRS)

Constellation | Perseus
Right ascension |  04h 08m 15.38813s[1]
Declination | +37° 43′ 38.9875″[1]
Apparent magnitude (V) | 6.07[2]
Characteristics
Spectral type | K1 III[3]
B−V color index | 0.943±0.003[2]
Astrometry
Radial velocity (Rv)| −44.35±0.20[2] km/s
Proper motion (μ)|  RA: −98.909[1] mas/yr
Dec.: −195.772[1] mas/yr
Parallax (π)| 22.0897 ± 0.0483[1] mas
Distance| 147.7 ± 0.3 ly
(45.27 ± 0.10 pc)
Absolute magnitude (MV)| 2.85[2]
Details
Mass| 1.38[4] M☉
Radius| 3.72+0.10
−0.09[1] R☉
Luminosity| 7.95±0.03[1] L☉
Surface gravity (log g)| 3.45[4] cgs
Temperature| 5,028+61
−70[1] K
Metallicity [Fe/H]| 0.02±0.04[2] dex
Age| 3.93[4] Gyr
Other designations

40 Per, BD+37°881, HD 25975, HIP 19302, HR 1277, SAO 57000[5]

Database references
SIMBAD| data

49 Persei is a star in the northern constellation of Perseus. It is just visible to the naked eye as a dim, orange-hued star with an apparent visual magnitude of 6.09.[2] Based upon parallax measurements, this star is located around 147.7 light-years (45.27 parsecs) away from the Sun, but is drifting closer with a radial velocity of −44 km/s.[2] It has a relatively large proper motion, traversing the celestial sphere at a rate of 0.220″·yr−1.[6]

This is an aging red giant star with a stellar classification of K1III, a star that has used up its core hydrogen and is expanding. It is a candidate horizontal branch star, which would indicate it is past the red giant branch stage and is fusing helium at its core.[7] The star is nearly four[4] billion years old with 1.4[4] times the mass of the Sun and 3.7[1] times the Sun's radius. It is radiating eight[1] times the luminosity of the Sun from its photosphere at an effective temperature of 5,028 K.[1]

## References

1. ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
3. ↑ Roman, Nancy G. (December 1955), "A Catalogue of High-Velocity Stars" (in en), The Astrophysical Journal Supplement Series 2: 195, doi:10.1086/190021, ISSN 0067-0049, Bibcode: 1955ApJS....2..195R.
4. ↑ 4.0 4.1 4.2 4.3 4.4 Luck, R. Earle (January 2017), "Abundances in the Local Region II: F, G, and K Dwarfs and Subgiants", The Astronomical Journal 153 (1): 19, doi:10.3847/1538-3881/153/1/21, 21, Bibcode: 2017AJ....153...21L.
5. ↑ "49 Per". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=49+Per.
6. ↑ Lépine, Sébastien; Shara, Michael M. (March 2005), "A Catalog of Northern Stars with Annual Proper Motions Larger than 0.15" (LSPM-NORTH Catalog)", The Astronomical Journal 129 (3): 1483–1522, doi:10.1086/427854, Bibcode: 2005AJ....129.1483L.
7. ↑ Afșar, Melike et al. (June 2018), "A Spectroscopic Survey of Field Red Horizontal-branch Stars", The Astronomical Journal 155 (6): 25, doi:10.3847/1538-3881/aabe86, 240, Bibcode: 2018AJ....155..240A.

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* 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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