NGC 2232
NGC 2232 | |
---|---|
NGC 2232 (taken from Stellarium) | |
Observation data (J2000 epoch) | |
Right ascension | 06h 27m 15s[1] |
Declination | –04° 45′ 30″[1] |
Distance | 1,060 ly (325 pc)[2] |
Apparent magnitude (V) | 3.9[3] |
Apparent dimensions (V) | 30′[3] |
Physical characteristics | |
Mass | < 100[4] M☉ |
Radius | ~15 ly[4] |
Estimated age | 30.9 Myr[2] |
Other designations | Cr 93, C 0624-047[5] |
Associations | |
Constellation | Monoceros |
See also: Open cluster, List of open clusters |
NGC 2232 is a bright open star cluster in the equatorial constellation of Monoceros, centered on the star 10 Monocerotis.[3] It is located in the Gould Belt close to the Orion Nebula cluster,[6] at a mean distance of 1,060 ly from the Sun.[2] The average radial velocity of the cluster members is 26.6±0.77 km/s.[7] This is one of the nearest open clusters to the Sun, which makes it a potentially useful target for studying young stars and their transition to the main sequence.[8]
The cluster has an angular radius of 36′ and a core angular radius of 7.2′. It is a sparse cluster with twenty high–probability members.[2] This is considered a super-solar cluster, with the components generally having a higher abundance of iron compared to the Sun. The mean metallicity is 0.22±0.09 or 0.32±0.08, depending on what assumptions are made.[7] At least four cluster members display an infrared excess at a wavelength of 8μm that is suggestive of warm dust, while the A-type star HD 45435 displays a strong excess at 24μm. The latter may indicate the star is in an early evolutionary state.[6] Only one member of the cluster appears to be chemically peculiar.[9]
References
- ^ a b Wu, Zhen-Yu; et al. (November 2009), "The orbits of open clusters in the Galaxy", Monthly Notices of the Royal Astronomical Society, 399 (4): 2146–2164, arXiv:0909.3737, Bibcode:2009MNRAS.399.2146W, doi:10.1111/j.1365-2966.2009.15416.x, S2CID 6066790.
{{citation}}
: CS1 maint: unflagged free DOI (link) - ^ a b c d Kharchenko, N. V.; et al. (2005), "Astrophysical parameters of Galactic open clusters", Astronomy and Astrophysics, 438 (3): 1163–1173, arXiv:astro-ph/0501674, Bibcode:2005A&A...438.1163K, doi:10.1051/0004-6361:20042523, S2CID 9079873.
- ^ a b c Dunlop, Storm (2005). Atlas of the Night Sky. Collins. ISBN 978-0-00-717223-8.
- ^ a b Finlay, Warren H. (2014), Concise Catalog of Deep-sky Objects, The Patrick Moore Practical Astronomy Series (2nd ed.), Springer Science & Business Media, p. 188, ISBN 978-3-319-03169-9.
- ^ "NGC 2232". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-04-12.
- ^ a b Currie, Thayne; et al. (November 2008), "A Spitzer Study of Debris Disks in the Young Nearby Cluster NGC 2232: Icy Planets Are Common around ~1.5-3 M☉ Stars", The Astrophysical Journal, 688 (1): 597–615, arXiv:0807.2056, Bibcode:2008ApJ...688..597C, doi:10.1086/591842, S2CID 28733060.
- ^ a b Monroe, TalaWanda R.; Pilachowski, Catherine A. (December 2010), "Metallicities of Young Open Clusters. I. NGC 7160 and NGC 2232", The Astronomical Journal, 140 (6): 2109–2123, arXiv:1010.0739, Bibcode:2010AJ....140.2109M, doi:10.1088/0004-6256/140/6/2109, S2CID 119241382.
- ^ Orban, Chris; Patten, Brian (January 1, 2004), Late-Type Membership of the Open Cluster NGC 2232, Greenbelt, MD, United States: NASA Goddard Space Flight Center, retrieved 2020-04-13.
- ^ Jenkner, H.; Maitzen, H. M. (November 1987), "Photoelectric search for CP2-stars in open clusters. X. NGC 2232, NGC2343, CR 140, and TR 10.", Astronomy and Astrophysics, Supplemental Series, 71: 255–261, Bibcode:1987A&AS...71..255J.
External links
- Media related to NGC 2232 at Wikimedia Commons
- Pang, Xiaoying; Li, Yuqian; Tang, Shih-Yun; Pasquato, Mario; Kouwenhoven, M. B. N. (2020). "Different Fates of Young Star Clusters after Gas Expulsion". The Astrophysical Journal. 900 (1): L4. arXiv:2008.02803. Bibcode:2020ApJ...900L...4P. doi:10.3847/2041-8213/abad28. S2CID 221083377.
- v
- t
- e
- 2000
- 2001
- 2002
- 2003
- 2004
- 2005
- 2006
- 2007
- 2008
- 2009
- 2010
- 2011
- 2012
- 2013
- 2014
- 2015
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- 2028
- 2029
- 2030
- 2031
- 2032
- 2033
- 2034
- 2035
- 2036
- 2037
- 2038
- 2039
- 2040
- 2041
- 2042
- 2043
- 2044
- 2045
- 2046
- 2047
- 2048
- 2049
- 2050
- 2051
- 2052
- 2053
- 2054
- 2055
- 2056
- 2057
- 2058
- 2059
- 2060
- 2061
- 2062
- 2063
- 2064
- 2065
- 2066
- 2067
- 2068
- 2069
- 2070
- 2071
- 2072
- 2073
- 2074
- 2075
- 2076
- 2077
- 2078
- 2079
- 2080
- 2081
- 2082
- 2083
- 2084
- 2085
- 2086
- 2087
- 2088
- 2089
- 2090
- 2091
- 2092
- 2093
- 2094
- 2095
- 2096
- 2097
- 2098
- 2099
- 2100
- 2101
- 2102
- 2103
- 2104
- 2105
- 2106
- 2107
- 2108
- 2109
- 2110
- 2111
- 2112
- 2113
- 2114
- 2115
- 2116
- 2117
- 2118
- 2119
- 2120
- 2121
- 2122
- 2123
- 2124
- 2125
- 2126
- 2127
- 2128
- 2129
- 2130
- 2131
- 2132
- 2133
- 2134
- 2135
- 2136
- 2137
- 2138
- 2139
- 2140
- 2141
- 2142
- 2143
- 2144
- 2145
- 2146
- 2147
- 2148
- 2149
- 2150
- 2151
- 2152
- 2153
- 2154
- 2155
- 2156
- 2157
- 2158
- 2159
- 2160
- 2161
- 2162
- 2163
- 2164
- 2165
- 2166
- 2167
- 2168
- 2169
- 2170
- 2171
- 2172
- 2173
- 2174
- 2175
- 2176
- 2177
- 2178
- 2179
- 2180
- 2181
- 2182
- 2183
- 2184
- 2185
- 2186
- 2187
- 2188
- 2189
- 2190
- 2191
- 2192
- 2193
- 2194
- 2195
- 2196
- 2197
- 2198
- 2199
- 2200
- 2201
- 2202
- 2203
- 2204
- 2205
- 2206
- 2207
- 2208
- 2209
- 2210
- 2211
- 2212
- 2213
- 2214
- 2215
- 2216
- 2217
- 2218
- 2219
- 2220
- 2221
- 2222
- 2223
- 2224
- 2225
- 2226
- 2227
- 2228
- 2229
- 2230
- 2231
- 2232
- 2233
- 2234
- 2235
- 2236
- 2237
- 2238
- 2239
- 2240
- 2241
- 2242
- 2243
- 2244
- 2245
- 2246
- 2247
- 2248
- 2249
- 2250
- 2251
- 2252
- 2253
- 2254
- 2255
- 2256
- 2257
- 2258
- 2259
- 2260
- 2261
- 2262
- 2263
- 2264
- 2265
- 2266
- 2267
- 2268
- 2269
- 2270
- 2271
- 2272
- 2273
- 2274
- 2275
- 2276
- 2277
- 2278
- 2279
- 2280
- 2281
- 2282
- 2283
- 2284
- 2285
- 2286
- 2287
- 2288
- 2289
- 2290
- 2291
- 2292
- 2293
- 2294
- 2295
- 2296
- 2297
- 2298
- 2299
- 2300
- 2301
- 2302
- 2303
- 2304
- 2305
- 2306
- 2307
- 2308
- 2309
- 2310
- 2311
- 2312
- 2313
- 2314
- 2315
- 2316
- 2317
- 2318
- 2319
- 2320
- 2321
- 2322
- 2323
- 2324
- 2325
- 2326
- 2327
- 2328
- 2329
- 2330
- 2331
- 2332
- 2333
- 2334
- 2335
- 2336
- 2337
- 2338
- 2339
- 2340
- 2341
- 2342
- 2343
- 2344
- 2345
- 2346
- 2347
- 2348
- 2349
- 2350
- 2351
- 2352
- 2353
- 2354
- 2355
- 2356
- 2357
- 2358
- 2359
- 2360
- 2361
- 2362
- 2363
- 2364
- 2365
- 2366
- 2367
- 2368
- 2369
- 2370
- 2371
- 2372
- 2373
- 2374
- 2375
- 2376
- 2377
- 2378
- 2379
- 2380
- 2381
- 2382
- 2383
- 2384
- 2385
- 2386
- 2387
- 2388
- 2389
- 2390
- 2391
- 2392
- 2393
- 2394
- 2395
- 2396
- 2397
- 2398
- 2399
- 2400
- 2401
- 2402
- 2403
- 2404
- 2405
- 2406
- 2407
- 2408
- 2409
- 2410
- 2411
- 2412
- 2413
- 2414
- 2415
- 2416
- 2417
- 2418
- 2419
- 2420
- 2421
- 2422
- 2423
- 2424
- 2425
- 2426
- 2427
- 2428
- 2429
- 2430
- 2431
- 2432
- 2433
- 2434
- 2435
- 2436
- 2437
- 2438
- 2439
- 2440
- 2441
- 2442
- 2443
- 2444
- 2445
- 2446
- 2447
- 2448
- 2449
- 2450
- 2451
- 2452
- 2453
- 2454
- 2455
- 2456
- 2457
- 2458
- 2459
- 2460
- 2461
- 2462
- 2463
- 2464
- 2465
- 2466
- 2467
- 2468
- 2469
- 2470
- 2471
- 2472
- 2473
- 2474
- 2475
- 2476
- 2477
- 2478
- 2479
- 2480
- 2481
- 2482
- 2483
- 2484
- 2485
- 2486
- 2487
- 2488
- 2489
- 2490
- 2491
- 2492
- 2493
- 2494
- 2495
- 2496
- 2497
- 2498
- 2499