X1 Centauri

Short description: Star in the constellation Centaurus

x1 Centauri  Observation data
Equinox J2000.0]] (ICRS)

Constellation | Centaurus[1]
Right ascension |  12h 23m 35.420s[2]
Declination | −35° 24′ 45.64″[2]
Apparent magnitude (V) | 5.32[1]
Characteristics
Spectral type | B8/9V[3]
B−V color index | −0.08[4]
Astrometry
Radial velocity (Rv)| −10.00[5] km/s
Proper motion (μ)|  RA: −42.132[2] mas/yr
Dec.: −6.896[2] mas/yr
Parallax (π)| 7.3671 ± 0.0953[2] mas
Distance| 443 ± 6 ly
(136 ± 2 pc)
Absolute magnitude (MV)| −0.2[6]
Details
Mass| 3[7] M☉
Radius| 3.6[8] R☉
Luminosity| 265[9] L☉
Temperature| 11,300[7] K
Age| 0.151[7] Gyr
Other designations

x1 Cen, CD−34°8117, GC 16892, HD 107832, HIP 60449, HR 4712, SAO 203420, G 113 G. Cen[9][10]

Database references
SIMBAD| data

x1 Centauri is a star located in the constellation Centaurus. Its name is a Bayer designation; it is also known by its designations HD 107832 and HR 4712. The apparent magnitude of the star is about 5.32,[1] meaning it is only visible to the naked eye under excellent viewing conditions. Its distance is about 443 light-years (136 pc) from Earth based on parallax measurements.[2]

x1 Centauri's spectral type is B8/9V, meaning it is a late B-type main sequence star. These types of stars are a few times more massive than the Sun, and have effective temperatures of about 10,000 to 30,000 K. x1 Centauri is just over 3 times more massive than the Sun[7] and has a temperature of about 11,300 K.[7] The star x2 Centauri, which lies about 0.4′ away from x1 Centauri, may or may not form a physical binary star system with x1 Centauri, as the two have similar proper motions and distances.[10][11]

## References

1. ↑ 1.0 1.1 1.2 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A XHIP record for this object at VizieR.
2. ↑ 2.0 2.1 2.2 2.3 2.4 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940. Gaia DR3 record for this source at VizieR.
3. ↑ Houk, Nancy (1979). Michigan catalogue of two-dimensional spectral types for the HD stars. 3. Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan. Bibcode: 1982mcts.book.....H.
4. ↑ Johnson, H. L. et al. (1966). "Ubvrijkl Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory 4: 99–110. Bibcode: 1966CoLPL...4...99J.
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. ↑ Jaschek, C.; Gomez, A. E. (1998). "The absolute magnitude of the early type MK standards from HIPPARCOS parallaxes". Astronomy and Astrophysics 330 (619–625): 619. Bibcode: 1998A&A...330..619J.
7. ↑ 7.0 7.1 7.2 7.3 7.4 Grosbol, P. J. (1978). "Space velocities and ages of nearby early-type stars". Astronomy and Astrophysics Supplement Series 32: 409–421. Bibcode: 1978A&AS...32..409G.
8. ↑ Pasinetti Fracassini, L. E. et al. (2001). "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Comments and statistics". Astronomy & Astrophysics 367 (2): 521–24. doi:10.1051/0004-6361:20000451. Bibcode: 2001A&A...367..521P.
9. ↑ 9.0 9.1 de Vaucouleurs, A. (1957). "Spectral types and luminosities of B, A and F southern stars". Monthly Notices of the Royal Astronomical Society 117 (4): 449. doi:10.1093/mnras/117.4.449. Bibcode: 1957MNRAS.117..449D.
10. ↑ 10.0 10.1 "* x1 Cen". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=*+x1+Cen.
11. ↑ "* x2 Cen". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=*+x2+Cen.

* v
* t
* e

Centaurus constellation

Stars (list)|

| Bayer|

* α (Rigil Kentaurus for A, Toliman for B, Proxima Centauri for C)
* β (Hadar)
* γ
* δ
* ε
* ζ
* η
* θ (Menkent)
* ι
* κ
* λ
* μ
* ν
* ξ1
* ξ2
* ο1
* ο2
* π
* ρ
* σ
* τ
* υ1
* υ2
* φ
* χ
* ψ

|

Flamsteed|

* 1 (i)
* 2 (g)
* 3 (k)
* 4 (h)

Variable|

* R
* T
* V
* Y
* RR
* SV
* SX
* BV
* DY
* V744
* V761 (a)
* V763 (C1)
* V766
* V803
* V810
* V816 (Przybylski's Star)
* V831
* V842
* V863
* V945 (H)
* V1032

HR|

* 4460 (A)
* 4466 (C2)
* 4476 (C3)
* 4499
* 4522
* 4523
* 4537 (j)
* 4546 (B)
* 4620 (E)
* 4652 (D)
* 4682 (F)
* 4712 (x1)
* 4721
* 4724 (x2)
* 4732 (G)
* 4748 (u)
* 4796
* 4817 (l)
* 4831 (w)
* 4874 (p)
* 4888 (e)
* 4889 (n)
* 4940 (f)
* 4979
* 4989
* 5006 (r)
* 5035 (J)
* 5041 (m)
* 5071 (K)
* 5089 (d)
* 5141 (Q)
* 5172 (M)
* 5174 (z)
* 5207 (N)
* 5222 (y)
* 5241
* 5297
* 5358 (v)
* 5371
* 5471 (b)
* 5485 (c1)
* 5489 (c2)

HD|

* 96660
* 97413
* 98176
* 101930
* 102117 (Uklun)
* 103197
* 107914
* 109749
* 113538
* 113766
* 114386
* 114729
* 117207
* 117618 (Dofida)
* 121228
* 121504
* 125072
* 125595
* 131399

Other|

* WASP-15 (Nyamien)
* 2M1207
* BPM 37093
* Centaurus X-3 (Krzeminski's Star)
* Nova Centauri 2013
* Proxima Centauri

Star clusters|

| Open|

* IC 2944
* NGC 3766
* NGC 4230
* NGC 5281
* NGC 5316
* NGC 5460
* NGC 5617
* NGC 5662
* Stock 16

|

Globular|

* NGC 5286
* Omega Centauri

Nebulae|

| H II|

* IC 2944

|

Planetary|

* Boomerang Nebula
* Fleming 1
* NGC 3918
* NGC 5307
* Southern Crab Nebula

SNR|

* G292.0+1.8
* SN 185 (RCW 86)

Galaxies|

| NGC|

* 3783
* 4444
* 4603
* 4622
* 4650A
* 4683
* 4696
* 4706
* 4709
* 4729
* 4730
* 4743
* 4744
* 4945
* 4976
* 5011
* 5011A
* 5026
* 5090
* 5091
* 5102
* 5114
* 5161
* 5253
* 5291
* 5398
* 5408

|

Other|

* ESO 325-G004
* ESO 444-46

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