Global InformationCK Carinae information
 An I band (near infrared) light curve for CK Carinae, plotted from ASAS data[1] | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Carina |
| Right ascension | 10h 24m 25.36s[2] |
| Declination | −60° 11′ 29.0″[2] |
| Apparent magnitude (V) | 7.2 - 8.5[3] |
| Characteristics | |
| Spectral type | M3.5 Iab[4] |
| B−V color index | +2.21[2] |
| Variable type | SRc[4] |
| Astrometry | |
| Radial velocity (Rv) | −3.92[5] km/s |
| Proper motion (μ) | RA: −7.351[5] mas/yr Dec.: 2.995[5] mas/yr |
| Parallax (π) | 0.4286 ± 0.0806 mas[5] |
| Distance | 2,920+190 −150[6] pc |
| Absolute magnitude (MV) | −6.31[2] |
| Details | |
| Mass | 15[7] M☉ |
| Radius | 690[7] R☉ |
| Luminosity | 72,000[7] L☉ |
| Surface gravity (log g) | 0[7] cgs |
| Temperature | 3,500[7] K |
| Metallicity [Fe/H] | 0.05[8] dex |
| Other designations | |
CK Car, CD−59°3058, HD 90382, SAO 238038 | |
| Database references | |
| SIMBAD | data |
CK Carinae (CK Car / HD 90382 / SAO 238038) is a variable star in the constellation Carina, the keel of Argo Navis. It is a member of the star association Carina OB1-D, at a distance of around 2,300 parsecs or 7,500 light years.
Classified as a semiregular variable star, CK Carinae's brightness varies between apparent magnitudes +7.2 and +8.5 with a period of approximately 525 days.[3] It has a Gaia Data Release 2 parallax of 0.4286±0.0806 mas,[5] which implies a distance of around 2,300 pc, and is thought to be a member of the Carina OB1-D stellar association which is at a distance of about 2,200 pc.[2][9] An analysis of the distances of apparently-nearby OB stars implies a distance of 2,920 pc for CK Carinae.[6] It has an MK spectral classification of M3.5 Iab, with the luminosity class indicating an intermediate luminosity supergiant.[4]
CK Carinae is a red supergiant with an effective temperature of 3,500 K.[7] It is 690 times larger than the Sun,[7] which means that if it were in the place of the Sun, its surface would reach beyond the orbit of Mars, with Earth being encompassed within the star. Consequently, CK Carinae is also a luminous star, radiating 72,000 times as much energy as the sun.[7]
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dr2was invoked but never defined (see the help page). - ^ a b Davies, Ben; Beasor, Emma R. (March 2020). "The 'red supergiant problem': the upper luminosity boundary of Type II supernova progenitors". MNRAS. 493 (1): 468–476. arXiv:2001.06020. Bibcode:2020MNRAS.493..468D. doi:10.1093/mnras/staa174. S2CID 210714093.
- ^ a b c d e f g h González-Torà, G.; Wittkowski, M.; Davies, B.; Plez, B. (2024). "The effect of winds on atmospheric layers of red supergiants II. Modelling VLTI/GRAVITY and MATISSE observations of AH Sco, KW SGR, V602 Car, CK Car, and V460 Car". Astronomy & Astrophysics. 683: A19. arXiv:2312.12521. Bibcode:2024A&A...683A..19G. doi:10.1051/0004-6361/202348047.
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