Collinder 228

Collinder 228
Collinder 228
Observation data (J2000 epoch)
Right ascension	10h 44m 00.0s
Declination	−60° 05′ 12″
Distance	10,000 ly
Apparent magnitude (V)	4.4
Apparent dimensions (V)	14
Physical characteristics
Other designations	OCl 828.0, MWSC 1845, C 1041-597, KPR2004b 262
Associations
Constellation	Carina
	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 and 6.49.^[3]

Prominent stars
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)	^[6]
V661 Car (HD 93130)	1	39900	-6.3	-10.1	68	O7II(f)	^[6]
HD 305525	98	43600	-5.7	-9.8	58	O6V	^[6]
	97	46100	-4.8	-9	47	O5V	^[6]
HD 93146		42400	-5.1	-9.1	44	O6.5V((f))	^[6]
HD 305524	7	41000	-5.2	-9.1	42	O7V((f))	^[6]
HD 93222	6	37200	-5.7	-9.3	42	O8III((f))	^[6]
HD 305523	32	35700	-5.6	-9.1	38	O8.5III	^[6]
HD 305532	38	43600	-4.4	-8.5	38	O6V((f))	^[6]
HD 305438	24	38500	-4.6	-8.4	32	O8V	^[6]
HD 93028	27	35700	-4.9	-8.4	30	O8.5III	^[6]
HD 305518	22	34700	-5	-8.3	29	O9.5V	^[6]
HD 93027	14	36000	-4.8	-8.3	29	O9V	^[6]
	39	37200	-4.6	-8.2	29	O8.5V((f))	^[6]
HD 305539	94	37200	-4.4	-8.1	28	O8.5V	^[6]
	67	36000	-4.7	-8.2	28	O9V	^[6]
HD 93576	93	36000	-4.7	-8.2	28	O9V	^[6]
	21	37200	-4.2	-7.8	27	O8.5V	^[6]
HD 305536	5	34700	-4.7	-8.1	26	O9.5V	^[6]
	66	34700	-3.9	-7.3	22	O9.5V	^[6]
	12	20900	-6.1	-8	20	B2.5Ia:	^[6]

References[edit]

^ ^a ^b ^c ^d "Collinder 228". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-12-29.
^ Feinstein, A. (1995). "Open Clusters in the Carina Nebula". Revista Mexicana de Astronomía y Astrofísica, Serie de Conferencias. 2: 57. Bibcode:1995RMxAC...2...57F.
^ Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007–2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1: 02025. Bibcode:2009yCat....102025S.
^ 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.
^ Rainot, A.; Reggiani, M.; Sana, H.; Bodensteiner, J.; Gomez-Gonzalez, C. A.; Absil, O.; Christiaens, V.; Delorme, P.; Almeida, L. A.; Caballero-Nieves, S.; De Ridder, J.; Kratter, K.; Lacour, S.; Le Bouquin, J. -B.; Pueyo, L.; Zinnecker, H. (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.
^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ ^o ^p ^q ^r ^s ^t ^u ^v Massey, P.; Degioia-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.
^ Parkin, E. R.; Broos, P. S.; Townsley, L. K.; Pittard, J. M.; et al. (2011). "X-ray emission from the double-binary OB-star system QZ Car (HD 93206)". The Astrophysical Journal Supplement. 194 (1): article id. 8, 11 pp. arXiv:1103.0794. Bibcode:2011ApJS..194....8P. doi:10.1088/0067-0049/194/1/8. S2CID 119292907.

[SIMBAD-1] "Collinder 228". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-12-29.

[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.

[gcvs-3] Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007–2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1: 02025. Bibcode:2009yCat....102025S.

[hamann-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.

[rainot-5] Rainot, A.; Reggiani, M.; Sana, H.; Bodensteiner, J.; Gomez-Gonzalez, C. A.; Absil, O.; Christiaens, V.; Delorme, P.; Almeida, L. A.; Caballero-Nieves, S.; De Ridder, J.; Kratter, K.; Lacour, S.; Le Bouquin, J. -B.; Pueyo, L.; Zinnecker, H. (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.

[Massey-6] ^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ ^o ^p ^q ^r ^s ^t ^u ^v Massey, P.; Degioia-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.

[parkin-7] Parkin, E. R.; Broos, P. S.; Townsley, L. K.; Pittard, J. M.; et al. (2011). "X-ray emission from the double-binary OB-star system QZ Car (HD 93206)". The Astrophysical Journal Supplement. 194 (1): article id. 8, 11 pp. arXiv:1103.0794. Bibcode:2011ApJS..194....8P. doi:10.1088/0067-0049/194/1/8. S2CID 119292907.

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