Xi Persei

Short description: Star in the constellation Perseus

Menkib

Location of ξ Persei (circled)

Observation data
Equinox J2000.0]] (ICRS)
Constellation | Perseus
Right ascension |  03h 58m 57.90229s[1]
Declination | +35° 47′ 27.7132″[1]
Apparent magnitude (V) | 4.04[2]
Characteristics
Spectral type | O7.5III(n)((f))[3]
U−B color index | −0.93[2]
B−V color index | +0.02[2]
Variable type | slightly variable[4]
Astrometry
Radial velocity (Rv)| 65.40[5] km/s
Proper motion (μ)|  RA: 3.62[1] mas/yr
Dec.: 1.74[1] mas/yr
Parallax (π)| 2.62 ± 0.51[1] mas
Distance| approx. 1,200 ly
(approx. 380 pc)
Absolute magnitude (MV)| −5.50[3]
Details
Mass| 26[3]-36[6] M☉
Radius| 14[6] R☉
Luminosity| 263,000[3] L☉
Surface gravity (log g)| 3.5[3] cgs
Temperature| 35,000[6] K
Rotational velocity (v sin i)| 220[3] km/s
Age| ~7[7] Myr
Other designations

46 Per, HR 1228, HD 24912, FK5 148, SAO 56856, HIP 18614, BD+35°775

Database references
SIMBAD| data

Xi Persei (ξ Persei, abbreviated Xi Per, ξ Per), known also as Menkib /ˈmɛŋkɪb/,[8][9] is a star in the constellation of Perseus. Based upon parallax measurements taken during the Hipparcos mission, it is approximately 1,200 light-years from the Sun.

## Contents

* 1 Nomenclature
* 2 Properties
* 3 References
* 4 External links

## Nomenclature

ξ Persei (Latinised to Xi Persei) is the star's Bayer designation.

It bore the traditional name Menkib, Menchib, Menkhib or Al Mankib, from Mankib al Thurayya (Arabic for "shoulder" [of the Pleiades]). In 2016, the International Astronomical Union (IAU) organized a Working Group on Star Names (WGSN)[10] to catalogue and standardize proper names for stars. The WGSN approved the name Menkib for this star on 12 September 2016 and it is now so included in the List of IAU-approved Star Names.[9]

In Chinese, 卷舌 (Juǎn Shé), meaning Rolled Tongue, refers to an asterism consisting of Xi Persei, Nu Persei, Epsilon Persei, Zeta Persei, Omicron Persei and 40 Persei.[11] Consequently, the Chinese name for Xi Persei itself is 卷舌三 (Juǎn Shé sān, "the Third Star of Rolled Tongue").[12]

## Properties

Xi Persei has an apparent magnitude of +4.06 and is classified as a blue giant (spectral class O7.5III). It is intrinsically 12,700 times brighter than the Sun with absolute magnitude −5.5 in the V band. If the ultraviolet light and light from other wavelengths that emanates from Menkib is included, its total bolometric luminosity is 263,000 times that of the Sun.

The star has a mass of some 30 solar masses and a surface temperature of 35,000 kelvins, making it one of the hottest stars that can be seen with the naked eye. The fluorescence of the California Nebula (NGC 1499) is due to this star's prodigious radiation.[7] It is a member of the Perseus OB2 association of co-moving stars, but may be a runaway star since it is now separated by 200 pc from the association's center and has an unusually high radial velocity.[13]

## References

1. ↑ 1.0 1.1 1.2 1.3 1.4 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.
2. ↑ 2.0 2.1 2.2 Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues 2237: 0. Bibcode: 2002yCat.2237....0D.
3. ↑ 3.0 3.1 3.2 3.3 3.4 3.5 Repolust, T.; Puls, J.; Herrero, A. (2004). "Stellar and wind parameters of Galactic O-stars. The influence of line-blocking/blanketing". Astronomy and Astrophysics 415 (1): 349–376. doi:10.1051/0004-6361:20034594. Bibcode: 2004A&A...415..349R.
4. ↑ Ramiaramanantsoa, Tahina; Moffat, Anthony F. J.; Chené, André-Nicolas; Richardson, Noel D.; Henrichs, Huib F.; Desforges, Sébastien; Antoci, Victoria; Rowe, Jason F. et al. (2014). "MOST detects corotating bright spots on the mid-O-type giant ξ Persei". Monthly Notices of the Royal Astronomical Society 441 (1): 910. doi:10.1093/mnras/stu619. Bibcode: 2014MNRAS.441..910R. https://pure.uva.nl/ws/files/2434272/160389_MOST_detects_corotating_bright_spots.pdf.
5. ↑ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters 32 (11): 759–771. doi:10.1134/S1063773706110065. Bibcode: 2006AstL...32..759G.
6. ↑ 6.0 6.1 6.2 Krticka, J.; Kubat, J. (2010). "Comoving frame models of hot star winds. I. Test of the Sobolev approximation in the case of pure line transitions". Astronomy and Astrophysics 519: A50. doi:10.1051/0004-6361/201014111. Bibcode: 2010A&A...519A..50K.
7. ↑ 7.0 7.1 Hoogerwerf, R.; De Bruijne, J. H. J.; De Zeeuw, P. T. (2001). "On the origin of the O and B-type stars with high velocities. II. Runaway stars and pulsars ejected from the nearby young stellar groups". Astronomy and Astrophysics 365 (2): 49. doi:10.1051/0004-6361:20000014. Bibcode: 2001A&A...365...49H.
8. ↑ Davis, George A. (1944). "The pronunciations, derivations, and meanings of a selected list of star names". Popular Astronomy 52: 8–30. Bibcode: 1944PA.....52....8D. http://adsbit.harvard.edu/full/1944PA.....52....8D.
9. ↑ 9.0 9.1 "Naming Stars". IAU.org. https://www.iau.org/public/themes/naming_stars/.
10. ↑ IAU Working Group on Star Names (WGSN), International Astronomical Union, https://www.iau.org/science/scientific_bodies/working_groups/280/, retrieved 22 May 2016.
11. ↑ Script error: The function "in_lang" does not exist. 中國星座神話, written by 陳久金. Published by 台灣書房出版有限公司, 2005, ISBN 978-986-7332-25-7.
12. ↑ Script error: The function "in_lang" does not exist. 香港太空館 - 研究資源 - 亮星中英對照表 , Hong Kong Space Museum. Accessed on line November 23, 2010.
13. ↑ Lesh, J. R. (September 1969). "Internal motions in the associations II Per and I Lac.". Astronomical Journal 74: 891–898. doi:10.1086/110878. Bibcode: 1969AJ.....74..891L.

## External links

* NASA Astronomy Picture of the Day: Image of Menkib (24 September 2006)

* 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

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