11 Persei

Star in the constellation Perseus

11 Persei
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS)
Constellation	Perseus
Right ascension	02^h 43^m 02.83826^s^[1]
Declination	+55° 06′ 21.6700″^[1]
Apparent magnitude (V)	5.76^[2]
Characteristics
Evolutionary stage	main sequence^[3]
Spectral type	B7 III(p?) (Hg?)^[4]
B−V color index	−0.110±0.003^[2]
Astrometry

Radial velocity (R_v)	−0.7±1.0^[2] km/s
Proper motion (μ)	RA: +34.859^[1] mas/yr Dec.: −21.955^[1] mas/yr
Parallax (π)	7.8022 ± 0.0874 mas^[1]
Distance	418 ± 5 ly (128 ± 1 pc)
Absolute magnitude (M_V)	0.16^[2]

Details

Mass	3.77±0.06^[3] `M`_☉
Radius	3.2^[5] `R`_☉
Luminosity	210.4+21.9 −19.9^[3] `L`_☉
Surface gravity (log g)	4.19^[6] cgs
Temperature	14,550^[6] K
Metallicity [Fe/H]	+0.09^[6] dex
Rotation	25–70 d^[7]
Rotational velocity (v sin i)	4.50^[8] km/s
Age	50.9±12.2^[9] Myr

Other designations
11 Per, BD+54°598, FK5 2188, HD 16727, HIP 12692, HR 785, SAO 23555^[10]
Database references
SIMBAD	data

11 Persei is a single^[11]^[8] star in the constellation of Perseus, located about 418 light years away from the Sun. It is visible to the naked eye as a dim, blue-white hued star with an apparent visual magnitude of 5.76.^[2]

This is a chemically peculiar mercury-manganese star.^[12]^[6] Cowley (1972) found a stellar classification of B7 III(p?) (Hg?),^[4] while Hube (1970) had B8 IV,^[13] and Appenzeller (1967) showed B6 V.^[14] Stellar models indicate this is a young B-type main sequence star^[3] with an estimated age of around 51^[9] million years. It has a low rotation rate, showing a projected rotational velocity of 4.50 km/s.^[8] The star has 3.8^[3] times the mass of the Sun and is radiating 210^[3] times the Sun's luminosity from its photosphere at an effective temperature of 14,550 K.^[6]

References

^ ^a ^b ^c ^d ^e Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
^ ^a ^b ^c ^d ^e Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.
^ ^a ^b ^c ^d ^e ^f Zorec, J.; Royer, F.; Asplund, Martin; Cassisi, Santi; Ramirez, Ivan; Melendez, Jorge; Bensby, Thomas; Feltzing, Sofia (2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy and Astrophysics, 537: A120, arXiv:1201.2052, Bibcode:2012A&A...537A.120Z, doi:10.1051/0004-6361/201117691, S2CID 55586789.
^ ^a ^b Cowley, A. (November 1972), "Spectral classification of the bright B8 stars", Astronomical Journal, 77: 750–755, Bibcode:1972AJ.....77..750C, doi:10.1086/111348.
^ Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics, 367 (Third ed.): 521–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451, S2CID 425754.
^ ^a ^b ^c ^d ^e Ghazaryan, S.; Alecian, G. (2016), "Statistical analysis from recent abundance determinations in HgMn stars", Monthly Notices of the Royal Astronomical Society, 460 (2): 1912, Bibcode:2016MNRAS.460.1912G, doi:10.1093/mnras/stw911.
^ Wahlgren, Glenn Michael; et al. (January 2012), "Emission Line Variability In The HgMn Star 11 Per", American Astronomical Society, AAS Meeting #219, vol. 219, p. 439.04, Bibcode:2012AAS...21943904W, 439.04.
^ ^a ^b ^c Hubrig, S.; Castelli, F. (September 2001), "New results of magnetic field diagnosis in HgMn stars and normal late B-type stars", Astronomy and Astrophysics, 375 (3): 963–976, Bibcode:2001A&A...375..963H, doi:10.1051/0004-6361:20010894.
^ ^a ^b Tetzlaff, N.; et al. (January 2011), "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun", Monthly Notices of the Royal Astronomical Society, 410 (1): 190–200, arXiv:1007.4883, Bibcode:2011MNRAS.410..190T, doi:10.1111/j.1365-2966.2010.17434.x, S2CID 118629873.
^ "11 Per". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-03-28.
^ 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, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.
^ Adelman, S. J.; Yüce, K. (August 2010), "Elemental abundance analyses with Coudé Echelle spectrograms from the TÜBİTAK National Observatory of Turkey: I. The HgMn stars 11 Per, HR 2801, and ν Cnc", Astronomische Nachrichten, 331 (8): 785–793, Bibcode:2010AN....331..785A, doi:10.1002/asna.201011411.
^ Hube, Douglas P. (1970), "The radial velocities of 335 late B-type stars", Memoirs of the Royal Astronomical Society, 72: 233–280, Bibcode:1970MmRAS..72..233H.
^ Appenzeller, Immo (April 1967), "MK Spectral Types for 185 Bright Stars", Publications of the Astronomical Society of the Pacific, 79 (467): 102, Bibcode:1967PASP...79..102A, doi:10.1086/128449.

Constellation of Perseus

Stars

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 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 V392 V396 V400 V423 V432 V440 V459 V461 V471 V472 V473 V480 V490 V492 V505 V509 V518 V520 (61 And) V521 V545 V551 V572 V573 V575 V576 V621 V718 V1024
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 HAT-P-15 (Berehynia) HAT-P-29 (Muspelheim) IRAS 04296+3429 L1448-IRS2E LkHα 101 LRLL 54361 NGC 1333 13 NGC 1333 IRAS 2A NGC 1333 IRAS 4A NGC 1333 IRAS 4B NGC 1624-2 PSR B0355+54 PSR J0357+3205 WR 4

Exoplanets	WASP-11b/HAT-P-10b

Star
clusters

NGC	869 (h) 884 (χ) 957 1039 1220 1285 1342 1444 1513 1528 1545 1624
Other	Alpha Persei Cluster IC 348 Trumpler 2

Nebulae

NGC	650 (Little Dumbbell Nebula) 1333 1491 1499 (California Nebula) 1579
Other	Barnard 203 Wreath Nebula

Galaxies

NGC	1003 1023 1058 1077 1160 1161 1167 1169 1250 1259 1260 1264 1265 1267 1268 1270 1271 1272 1273 1274 1275 1277 1278 1279 1281 1282 1283 1293 1294 1334
Other	IC 310 UGC 2885 (Godzilla galaxy) 4C +37.11