NGC 2359 - Misplaced Pages

(Redirected from NGC 2361) Emission nebula in the constellation Canis Major

Thor’s Helmet Nebula
Emission nebula
Thor’s Helmet Nebula imaged on the occasion of ESO’s 50th Anniversary.
Observation data: J2000 epoch
Right ascension	07 18 30
Declination	−13° 13.8′ ″
Distance	11,960 ly
Constellation	Canis Major

Notable features	HII (ionized) region
Designations	GUM 4, LBN 227.66-00.09, SH 2-298, GRS 227.80 -00.20, LBN 1041, RCW 5
See also: Lists of nebulae

NGC 2359 (also known as Thor's Helmet) is an emission nebula in the constellation Canis Major. The nebula is approximately 3,670 parsecs (11.96 thousand light years) away and 30 light-years in size. The central star is the Wolf-Rayet star WR7, an extremely hot star thought to be in a brief pre-supernova stage of evolution. It is similar in nature to the Bubble Nebula, but interactions with a nearby large molecular cloud are thought to have contributed to the more complex shape and curved bow-shock structure of Thor's Helmet.

It is also catalogued as Sharpless 2-298 and Gum 4.

The nebula has an overall bubble shape, but with complex filamentary structures. The nebula contains several hundred solar masses of ionised material, plus several thousand more of unionised gas. It is largely interstellar material swept up by winds from the central star, although some material does appear to be enriched with the products of fusion and is likely to come directly from the star. The expansion rate of different portions of the nebula varies from 10 km/s to at least 30 km/s, leading to age estimates of 78,500 - 236,000 years. The nebula has been studied at radio and x-ray wavelengths, but it is still unclear whether it was produced at the class O main sequence stage of development, as a red supergiant, luminous blue variable, or mainly as a Wolf-Rayet star.

NGC 2361 is a bright knot of nebulosity on one edge of the central ring of NGC 2359.

References

^ "NGC 2359". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 5 October 2012.
^ Zhekov, S. A. (2014). "X-rays from wind-blown bubbles: An XMM-Newton detection of NGC 2359". Monthly Notices of the Royal Astronomical Society. 443 (1): 12–18. arXiv:1406.2463. Bibcode:2014MNRAS.443...12Z. doi:10.1093/mnras/stu1138.
SEDS: NGC 2359 Archived 2010-03-26 at the Wayback Machine
"The Gum Catalog". Galaxymap.org. Archived from the original on 2013-07-16. Retrieved 2013-10-06.
Cappa, C. E.; Goss, W. M.; Niemela, V. S.; Ostrov, P. G. (1999). "A Study of Neutral and Ionized Gas of the Wolf-Rayet Ring Nebula NGC 2359". The Astronomical Journal. 118 (2): 948. Bibcode:1999AJ....118..948C. doi:10.1086/300995. S2CID 123709946.

External links

Astronomy Picture of the Day - Search for NGC 2359
astrosurf.com
Kopernik image
NGC 2359 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
Encyclopedia article
ESO celebrates its 50th anniversary
Thor's Helmet at Constellation Guide

v t e Sharpless catalog
Sh 2-1 Sh 2-2 Sh 2-3 Sh 2-4 Sh 2-5 Sh 2-6 Sh 2-7 Sh 2-8 Sh 2-9 Sh 2-10 Sh 2-11 Sh 2-12 Sh 2-13 Sh 2-14 Sh 2-15 Sh 2-16 Sh 2-17 Sh 2-18 Sh 2-19 Sh 2-20 Sh 2-21 Sh 2-22 Sh 2-23 Sh 2-24 Sh 2-25 Sh 2-26 Sh 2-27 Sh 2-28 Sh 2-29 Sh 2-30 Sh 2-31 Sh 2-32 Sh 2-33 Sh 2-34 Sh 2-35 Sh 2-36 Sh 2-37 Sh 2-38 Sh 2-39 Sh 2-40 Sh 2-41 Sh 2-42 Sh 2-43 Sh 2-44 Sh 2-45 Sh 2-46 Sh 2-47 Sh 2-48 Sh 2-49 Sh 2-50 Sh 2-51 Sh 2-52 Sh 2-53 Sh 2-54 Sh 2-55 Sh 2-56 Sh 2-57 Sh 2-58 Sh 2-59 Sh 2-60 Sh 2-61 Sh 2-62 Sh 2-63 Sh 2-64 Sh 2-65 Sh 2-66 Sh 2-67 Sh 2-68 Sh 2-69 Sh 2-70 Sh 2-71 Sh 2-72 Sh 2-73 Sh 2-74 Sh 2-75 Sh 2-76 Sh 2-77 Sh 2-78 Sh 2-79 Sh 2-80 Sh 2-81 Sh 2-82 Sh 2-83 Sh 2-84 Sh 2-85 Sh 2-86 Sh 2-87 Sh 2-88 Sh 2-89 Sh 2-90 Sh 2-91 Sh 2-92 Sh 2-93 Sh 2-94 Sh 2-95 Sh 2-96 Sh 2-97 Sh 2-98 Sh 2-99 Sh 2-100 Sh 2-101 Sh 2-102 Sh 2-103 Sh 2-104 Sh 2-105 Sh 2-106 Sh 2-107 Sh 2-108 Sh 2-109 Sh 2-110 Sh 2-111 Sh 2-112 Sh 2-113 Sh 2-114 Sh 2-115 Sh 2-116 Sh 2-117 Sh 2-118 Sh 2-119 Sh 2-120 Sh 2-121 Sh 2-122 Sh 2-123 Sh 2-124 Sh 2-125 Sh 2-126 Sh 2-127 Sh 2-128 Sh 2-129 Sh 2-130 Sh 2-131 Sh 2-132 Sh 2-133 Sh 2-134 Sh 2-135 Sh 2-136 Sh 2-137 Sh 2-138 Sh 2-139 Sh 2-140 Sh 2-141 Sh 2-142 Sh 2-143 Sh 2-144 Sh 2-145 Sh 2-146 Sh 2-147 Sh 2-148 Sh 2-149 Sh 2-150 Sh 2-151 Sh 2-152 Sh 2-153 Sh 2-154 Sh 2-155 Sh 2-156 Sh 2-157 Sh 2-158 Sh 2-159 Sh 2-160 Sh 2-161 Sh 2-162 Sh 2-163 Sh 2-164 Sh 2-165 Sh 2-166 Sh 2-167 Sh 2-168 Sh 2-169 Sh 2-170 Sh 2-171 Sh 2-172 Sh 2-173 Sh 2-174 Sh 2-175 Sh 2-176 Sh 2-177 Sh 2-178 Sh 2-179 Sh 2-180 Sh 2-181 Sh 2-182 Sh 2-183 Sh 2-184 Sh 2-185 Sh 2-186 Sh 2-187 Sh 2-188 Sh 2-189 Sh 2-190 Sh 2-191 Sh 2-192 Sh 2-193 Sh 2-194 Sh 2-195 Sh 2-196 Sh 2-197 Sh 2-198 Sh 2-199 Sh 2-201 Sh 2-202 Sh 2-203 Sh 2-204 Sh 2-205 Sh 2-206 Sh 2-207 Sh 2-208 Sh 2-209 Sh 2-210 Sh 2-211 Sh 2-212 Sh 2-213 Sh 2-214 Sh 2-215 Sh 2-216 Sh 2-217 Sh 2-218 Sh 2-219 Sh 2-220 Sh 2-221 Sh 2-222 Sh 2-223 Sh 2-224 Sh 2-225 Sh 2-226 Sh 2-227 Sh 2-228 Sh 2-229 Sh 2-230 Sh 2-231 Sh 2-232 Sh 2-233 Sh 2-234 Sh 2-235 Sh 2-236 Sh 2-237 Sh 2-238 Sh 2-239 Sh 2-240 Sh 2-241 Sh 2-242 Sh 2-243 Sh 2-244 Sh 2-245 Sh 2-246 Sh 2-247 Sh 2-248 Sh 2-249 Sh 2-250 Sh 2-251 Sh 2-252 Sh 2-253 Sh 2-254 Sh 2-255 Sh 2-256 Sh 2-257 Sh 2-258 Sh 2-259 Sh 2-260 Sh 2-261 Sh 2-262 Sh 2-263 Sh 2-264 Sh 2-265 Sh 2-266 Sh 2-267 Sh 2-268 Sh 2-269 Sh 2-270 Sh 2-271 Sh 2-272 Sh 2-273 Sh 2-274 Sh 2-275 Sh 2-276 Sh 2-277 Sh 2-278 Sh 2-279 Sh 2-280 Sh 2-281 Sh 2-282 Sh 2-283 Sh 2-284 Sh 2-285 Sh 2-286 Sh 2-287 Sh 2-288 Sh 2-289 Sh 2-290 Sh 2-291 Sh 2-292 Sh 2-293 Sh 2-294 Sh 2-295 Sh 2-296 Sh 2-297 Sh 2-298 Sh 2-299 Sh 2-301 Sh 2-302 Sh 2-303 Sh 2-304 Sh 2-305 Sh 2-306 Sh 2-307 Sh 2-308 Sh 2-309 Sh 2-310 Sh 2-311 Sh 2-312 Sh 2-313
See also: Gum catalog Nebula RCW Catalogue Stewart Sharpless

Sharpless catalog

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v t e Gum Catalog
Colin Stanley Gum
Gum 1 Gum 2 Gum 3 Gum 4 Gum 5 Gum 6 Gum 7 Gum 8 Gum 9 Gum 10 Gum 12 Gum 13 Gum 14 Gum 15 Gum 16 Gum 17 Gum 18 Gum 19 Gum 20 Gum 21 Gum 22 Gum 23 Gum 24 Gum 25 Gum 26 Gum 27 Gum 28 Gum 29 Gum 30 Gum 31 Gum 32 Gum 33 Gum 34 Gum 35 Gum 36 Gum 37 Gum 38 Gum 39 Gum 40 Gum 41 Gum 42 Gum 43 Gum 44 Gum 45 Gum 46 Gum 47 Gum 48 Gum 49 Gum 50 Gum 51 Gum 52 Gum 53 Gum 54 Gum 55 Gum 56 Gum 57 Gum 58 Gum 59 Gum 60 Gum 61 Gum 62 Gum 63 Gum 64 Gum 65 Gum 66 Gum 67 Gum 68 Gum 69 Gum 70 Gum 71 Gum 72 Gum 73 Gum 74 Gum 75 Gum 76 Gum 77 Gum 78 Gum 79 Gum 80 Gum 81 Gum 82 Gum 83 Gum 84 Gum 85
See also: Gum Nebula

v t e RCW Catalogue
RCW 1 RCW 2 RCW 3 RCW 4 RCW 5 RCW 6 RCW 7 RCW 8 RCW 9 RCW 10 RCW 11 RCW 12 RCW 13 RCW 14 RCW 15 RCW 16 RCW 17 RCW 18 RCW 19 RCW 20 RCW 21 RCW 22 RCW 23 RCW 24 RCW 25 RCW 26 RCW 27 RCW 28 RCW 29 RCW 30 RCW 31 RCW 32 RCW 33 RCW 34 RCW 35 RCW 36 RCW 37 RCW 38 RCW 39 RCW 40 RCW 41 RCW 42 RCW 43 RCW 44 RCW 45 RCW 46 RCW 47 RCW 48 RCW 49 RCW 50 RCW 51 RCW 52 RCW 53 RCW 54 RCW 55 RCW 56 RCW 57 RCW 58 RCW 59 RCW 60 RCW 61 RCW 62 RCW 63 RCW 64 RCW 65 RCW 66 RCW 67 RCW 68 RCW 69 RCW 70 RCW 71 RCW 72 RCW 73 RCW 74 RCW 75 RCW 76 RCW 77 RCW 78 RCW 79 RCW 80 RCW 81 RCW 82 RCW 83 RCW 84 RCW 85 RCW 86 RCW 87 RCW 88 RCW 89 RCW 90 RCW 91 RCW 92 RCW 93 RCW 94 RCW 95 RCW 96 RCW 97 RCW 98 RCW 99 RCW 100 RCW 101 RCW 102 RCW 103 RCW 104 RCW 105 RCW 106 RCW 107 RCW 108 RCW 109 RCW 110 RCW 111 RCW 112 RCW 113 RCW 114 RCW 115 RCW 116 RCW 117 RCW 118 RCW 119 RCW 120 RCW 121 RCW 122 RCW 123 RCW 124 RCW 125 RCW 126 RCW 127 RCW 128 RCW 129 RCW 130 RCW 131 RCW 132 RCW 133 RCW 134 RCW 135 RCW 136 RCW 137 RCW 138 RCW 139 RCW 140 RCW 141 RCW 142 RCW 143 RCW 144 RCW 145 RCW 146 RCW 147 RCW 148 RCW 149 RCW 150 RCW 151 RCW 152 RCW 153 RCW 154 RCW 155 RCW 156 RCW 157 RCW 158 RCW 159 RCW 160 RCW 161 RCW 162 RCW 163 RCW 164 RCW 165 RCW 166 RCW 167 RCW 168 RCW 169 RCW 170 RCW 171 RCW 172 RCW 173 RCW 174 RCW 175 RCW 176 RCW 177 RCW 178 RCW 179 RCW 180 RCW 181 RCW 182
See also: Emission nebula H I region H II region

RCW Catalogue

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v t e New General Catalogue 2000 to 2499
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
Astronomical catalog List of NGC objects 2001–3000

New General Catalogue 2000 to 2499

Constellation of Canis Major

Stars

Bayer	α (Sirius) β (Mirzam) γ (Muliphein) δ (Wezen) ε (Adhara) ζ (Furud) η (Aludra) θ ι κ λ μ ν ν ν ξ ξ ο ο π σ (Unurgunite) τ ω
Flamsteed	10 11 12 15 17 26 27 29
Variable	R W Z UW VY CX EZ FN FS FY LS NR V352
HR	2225 2318 2437 2447 2450 2758 2764 2766 2812
HD	43162 43197 (Amadioha) 45184 45364 47186 54879
Other	RX J0720.4−3125 WASP-64 (Atakoraka) WISE 0713−2917 WR 7

Exoplanets	ν Canis Majoris b HD 47536 b c HD 47186 b c HD 45364 b c HD 43197 b

Star
clusters

NGC	NGC 2204 NGC 2354 NGC 2360 NGC 2362 NGC 2374
Other	Gaia 1 Messier 41

Nebulae	NGC 2359 NGC 2361 Sh2-297

Galaxies

NGC	2207 2217 2227 2280 2283 2293
Other	Canis Major Overdensity IC 2163

Astronomical events	SN 1999ec SN 2003H