X1 Centauri

Short description: Star in the constellation Centaurus

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

Constellation | Centaurus
Right ascension |  12h 23m 35.42002s[1]
Declination | −35° 24′ 45.6383″[1]
Apparent magnitude (V) | 5.312[2]
Characteristics
Spectral type | B8/9V[2]
B−V color index | -0.08[3]
Astrometry
Radial velocity (Rv)| -10.00[4] km/s
Proper motion (μ)|  RA: -41.17[1] mas/yr
Dec.: -7.44[1] mas/yr
Parallax (π)| 7.34 ± 0.26[1] mas
Distance| 440 ± 20 ly
(136 ± 5 pc)
Absolute magnitude (MV)| -0.2[5]
Details
Mass| 3[6] M☉
Radius| 3.6[7] R☉
Luminosity| 265[8] L☉
Temperature| 11300[6] K
Age| 0.151[6] Gyr
Other designations

x1 Cen, 113 G. Cen,[8] CD-34° 8117, HD 107832, HIP 60449, SAO 203420, HR 4712, GC 16892[2]

Database references
SIMBAD| data

x1 Centauri is a star located in the constellation Centaurus. It is also known by its designations HD 107832 and HR 4712. The apparent magnitude of the star is about 5.3, meaning it is only visible to the naked eye under excellent viewing conditions. Its distance is about 440 light-years (140 parsecs), based on its parallax measured by the Hipparcos astrometry satellite.[1]

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[6] and has a temperature of about 11,300 K.[6] 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.[2][9]

## References

1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 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. http://www.aanda.org/index.php?option=com_article&access=bibcode&Itemid=129&bibcode=2007A%26A...474..653VFUL.
2. ↑ 2.0 2.1 2.2 2.3 "* x1 Cen". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=*+x1+Cen.
3. ↑ Johnson, H. L.; Mitchell, R. I.; Iriarte, B.; Wisniewski, W. Z. (1966). "Ubvrijkl Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory 4: 99–110. Bibcode: 1966CoLPL...4...99J.
4. ↑ 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. http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2006AstL...32..759G.
5. ↑ 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.
6. ↑ 6.0 6.1 6.2 6.3 6.4 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.
7. ↑ Pasinetti Fracassini, L. E. et al. (2001). "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics". Astronomy & Astrophysics 367 (2): 521–24. doi:10.1051/0004-6361:20000451. Bibcode: 2001A&A...367..521P.
8. ↑ 8.0 8.1 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.
9. ↑ "* x2 Cen". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=*+x2+Cen.

* http://www.alcyone.de/cgi-bin/search.pl?object=HR4712

* v
* t
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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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