Collinder 228

Collinder 228
Observation data (J2000 epoch)
Right ascension10h 44m 00.0s[1]
Declination−60° 05′ 12″[1]
Distance10,000 ly
Apparent magnitude (V)4.4[1]
Apparent dimensions (V)14
Physical characteristics
Other designationsOCl 828.0, MWSC 1845, C 1041-597, KPR2004b 262[1]
Associations
ConstellationCarina
See also: Open cluster, List of open clusters

Collinder 228 is an open cluster within the southern part of the Carina Nebula NGC 3372, about 25' south of η Carinae.[2] It is probably composed of stars which recently formed from the material in the nebula. QZ Carinae is the brightest member of Collinder 228 with an apparent magnitude between 6.16–6.49 .[3]

Prominent stars in Collinder 228
Star
name 		FMF
number 		Effective
temperature 		Absolute
magnitude 		Bolometric
magnitude 		Mass
(M☉) 		Spectral
type 		Ref.
WR 24
(HD 93131) 		3 50100 −7.34 −11.4 114 WN6ha-w [4]
QZ Car
(HD 93206) 		33 30400 + 20000 +
34000 + 32900 		−9.2 + 3 +
8.5 + 7 		−10.6 27.1 + 6.5 +
25.4 + 17.1 		O9.7I + B2V +
O8III + O9V 		[5][6][7]
HD 93632 92 45400 −6.1 −10.2 76 O5III(f) [7]
V661 Car
(HD 93130) 		1 39900 −6.3 −10.1 68 O7II(f) [7]
HD 305525 98 43600 −5.7 −9.8 58 O6V [7]
97 46100 −4.8 −9 47 O5V [7]
HD 93146 42400 −5.1 −9.1 44 O6.5V((f)) [7]
HD 305524 7 41000 −5.2 −9.1 42 O7V((f)) [7]
HD 93222 6 37200 −5.7 −9.3 42 O8III((f)) [7]
HD 305523 32 35700 −5.6 −9.1 38 O8.5III [7]
HD 305532 38 43600 −4.4 −8.5 38 O6V((f)) [7]
HD 305438 24 38500 −4.6 −8.4 32 O8V [7]
HD 93028 27 35700 −4.9 −8.4 30 O8.5III [7]
HD 305518 22 34700 −5 −8.3 29 O9.5V [7]
HD 93027 14 36000 −4.8 −8.3 29 O9V [7]
39 37200 −4.6 −8.2 29 O8.5V((f)) [7]
HD 305539 94 37200 −4.4 −8.1 28 O8.5V [7]
67 36000 −4.7 −8.2 28 O9V [7]
HD 93576 93 36000 −4.7 −8.2 28 O9V [7]
21 37200 −4.2 −7.8 27 O8.5V [7]
HD 305536 5 34700 −4.7 −8.1 26 O9.5V [7]
66 34700 −3.9 −7.3 22 O9.5V [7]
12 20900 −6.1 −8 20 B2.5Ia: [7]
  1. ^ a b c d "Collinder 228". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 29 December 2020.
  2. ^ Feinstein, A. (1995). "Open clusters in the Carina Nebula". Revista Mexicana de Astronomía y Astrofísica. Serie de Conferencias. 2: 57. Bibcode:1995RMxAC...2...57F.
  3. ^ Samus, N.N.; Durlevich, O.V.; et al. (2009). General Catalogue of Variable Stars (Samus+ 2007–2013) (Report). VizieR On-line Data Catalog. Vol. 1. p. 02025. Bibcode:2009yCat....102025S. doi:10.1134/S1063772917010085. B/GCVS. Originally published in Astronomy Reports (January 2017) DOI 10.1134/S1063772917010085
  4. ^ Sota, A.; Maíz Apellániz, J.; Morrell, N.I.; Barbá, R.H.; Walborn, N.R.; Gamen, R.C.; Arias, J.I.; Alfaro, E.J.; Oskinova, L.M. (2019). "The Galactic WN stars revisited. Impact of Gaia distances on fundamental stellar parameters". Astronomy & Astrophysics. A57: 625. arXiv:1904.04687. Bibcode:2019A&A...625A..57H. doi:10.1051/0004-6361/201834850. S2CID 104292503.
  5. ^ Rainot, A.; Reggiani, M.; Sana, H.; Bodensteiner, J.; Gomez-Gonzalez, C.A.; Absil, O.; et al. (2020). "Carina High-contrast Imaging Project for Massive Stars (CHIPS). I. Methodology and proof of concept on QZ Car (≡ HD 93206)". Astronomy and Astrophysics. 640: A15. arXiv:2006.01914. Bibcode:2020A&A...640A..15R. doi:10.1051/0004-6361/201936448. S2CID 219260368.
  6. ^ Parkin, E.R.; Broos, P.S.; Townsley, L.K.; Pittard, J.M.; Moffat, A.F.J.; Nazé, Y.; et al. (2011). "X-ray emission from the double-binary OB-star system QZ Car (HD 93206)". The Astrophysical Journal Supplement. 194 (1). article 8. arXiv:1103.0794. Bibcode:2011ApJS..194....8P. doi:10.1088/0067-0049/194/1/8. S2CID 119292907.
  7. ^ a b c d e f g h i j k l m n o p q r s t u v Massey, P.; de Gioia-Eastwood, K.; Waterhouse, E. (2001). "The progenitor masses of Wolf-Rayet stars and luminous blue variables determined from cluster turnoffs. II. Results from 12 Galactic clusters and OB associations". The Astronomical Journal. 121 (2): 1050–1070. arXiv:astro-ph/0010654. Bibcode:2001AJ....121.1050M. doi:10.1086/318769. S2CID 53345173.