Ensiklopedia Dunia

Technopedia Center

Faculty of Engineering and Computer Science
S1 Informatics S1 Information Systems S1 Information Technology S1 Computer Engineering S1 Electrical Engineering S1 Civil Engineering

faculty of Economics and Business
S1 Management S1 Accountancy

Faculty of Letters and Educational Sciences
S1 English literature S1 English language education S1 Mathematics education S1 Sports Education

Messier 46 - Wikipedia

Coordinates:

07^h 41.8^m 00^s, −14° 49′ 00″

From Wikipedia, the free encyclopedia

(Redirected from NGC 2437)

Messier 46
Open cluster Messier 46 in Puppis
Observation data (J2000.0 epoch)
Right ascension	07^h 41^m 46.0^s^[1]
Declination	−14° 48′ 36″^[1]
Distance	4,920 ± 980 ly (1,510 ± 302 pc)^[1]
Apparent magnitude (V)	6.0^[2]
Apparent dimensions (V)	22.8′^[3]
Physical characteristics
Mass	453+214 −145^[3] `M`_☉
Radius	37.8 ly^[3]
Estimated age	251.2^[1] Myr
contains superimposed planetary nebula NGC 2438
Other designations	M64, NGC 2437, Cr 159, C 0739-147, OCl 601.0^[4]
Associations
Constellation	Puppis
See also: Open cluster, List of open clusters

Messier 46 or M46, also known as NGC 2437, is an open cluster of stars in the slightly southern constellation of Puppis. It was discovered by Charles Messier in 1771. Dreyer described it as "very bright, very rich, very large." It is about 5,000 light-years away. There are an estimated 500 stars in the cluster with a combined mass of 453 M_☉,^[3] and it is thought to be a mid-range estimate of 251.2 million years old.^[1]

The cluster has a very broadest (tidal) radius of 37.8 ± 4.6 ly (11.6 ± 1.4 pc) and core radius of 8.5 ± 1.3 ly (2.6 ± 0.4 pc).^[3] It has a greater spatial extent in infrared than in visible light, suggesting it is undergoing some mass segregation with the fainter (redder) stars migrating to a coma (tail) region. The fainter stars that extend out to the south and west may form a tidal tail due to a past interaction.^[5]

The planetary nebula NGC 2438 appears to lie within the cluster near its northern edge (the faint almost rainbow array of colored smudge at the top-center of the image), but it is most likely unrelated since it does not share the cluster's radial velocity.^[6]^[7] This makes for superimposed objects of interest, another instance perhaps being NGC 2818.^[6]^[8] On the other hand, the illuminating star of the bipolar Calabash Nebula shares the radial velocity and proper motion of Messier 46, and is at the same distance, so is a bona fide member of the open cluster.^[9]

M46 is located close by to another open cluster, Messier 47.^[10] M46 is about a degree east of M47 in the sky, so the two fit well in a binocular or wide-angle telescope field.

References

^ ^a ^b ^c ^d ^e 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.
^ "Messier 46". SEDS Messier Catalog. Retrieved 29 April 2022.^{[permanent dead link‍]}
^ ^a ^b ^c ^d ^e Piskunov, A. E.; et al. (June 2007), "Towards absolute scales for the radii and masses of open clusters", Astronomy and Astrophysics, 468 (1): 151–161, arXiv:astro-ph/0702517, Bibcode:2007A&A...468..151P, doi:10.1051/0004-6361:20077073, S2CID 14769639.
^ "M 46". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 25 November 2018.
^ Davidge, T. J. (February 2013), "The Open Cluster NGC 2437 (Messier 46)", Publications of the Astronomical Society of the Pacific, 125 (924): 115–125, arXiv:1301.6806, Bibcode:2013PASP..125..115D, doi:10.1086/669823, S2CID 118656815
^ ^a ^b Majaess, D. J.; Turner, D.; Lane, D. (2007). "In Search of Possible Associations between Planetary Nebulae and Open Clusters". Publications of the Astronomical Society of the Pacific. 119 (862): 1349. arXiv:0710.2900. Bibcode:2007PASP..119.1349M. doi:10.1086/524414. S2CID 18640979.
^ Kiss, L. L.; Szabó, Gy. M.; Balog, Z.; Parker, Q. A.; et al. (2008). "AAOmega radial velocities rule out current membership of the planetary nebula NGC 2438 in the open cluster M46". Monthly Notices of the Royal Astronomical Society. 391 (1): 399–404. arXiv:0809.0327. Bibcode:2008MNRAS.391..399K. doi:10.1111/j.1365-2966.2008.13899.x. S2CID 15207860.
^ Mermilliod, J.-C.; Clariá, J. J.; Andersen, J.; Piatti, A. E.; et al. (2001). "Red giants in open clusters. IX. NGC 2324, 2818, 3960 and 6259". Astronomy & Astrophysics. 375: 30–39. Bibcode:2001A&A...375...30M. CiteSeerX 10.1.1.30.7545. doi:10.1051/0004-6361:20010845. S2CID 122773065.
^ Vickers S.B.; Frew D.J.; Parker Q.A.; Bojicic I.S. (2015). "New light on Galactic post-asymptotic giant branch stars – I. First distance catalogue". Monthly Notices of the Royal Astronomical Society. 447 (2): 1673. arXiv:1403.7230. Bibcode:2015MNRAS.447.1673V. doi:10.1093/mnras/stu2383.
^ "The hot blue stars of messier 47". ScienceDaily. 17 December 2014.

External links

Wikimedia Commons has media related to Messier 46.

v t e Messier objects
List	M1 M2 M3 M4 M5 M6 M7 M8 M9 M10 M11 M12 M13 M14 M15 M16 M17 M18 M19 M20 M21 M22 M23 M24 M25 M26 M27 M28 M29 M30 M31 M32 M33 M34 M35 M36 M37 M38 M39 M40 M41 M42 M43 M44 M45 M46 M47 M48 M49 M50 M51 M52 M53 M54 M55 M56 M57 M58 M59 M60 M61 M62 M63 M64 M65 M66 M67 M68 M69 M70 M71 M72 M73 M74 M75 M76 M77 M78 M79 M80 M81 M82 M83 M84 M85 M86 M87 M88 M89 M90 M91 M92 M93 M94 M95 M96 M97 M98 M99 M100 M101 M102 M103 Added M104 M105 M106 M107 M108 M109 M110
See also	Caldwell catalogue Catalogue of Nebulae and Clusters of Stars Herschel 400 Catalogue Index Catalogue New General Catalogue Revised New General Catalogue
Category Commons Portal

New General Catalogue 2000 to 2499

Constellation of Puppis

Stars

Bayer	ζ (Naos) ν ξ (Azmidi) ο π (Ahadi) ρ (Tureis) σ τ υ¹ υ² χ L₂
Flamsteed	1 2 3 (l) 4 5 6 8 9 10 11 (j) 12 14 16 18 19 20 21 22
Variable	R T (not variable) V X Y Z RS RX ST TY UY UZ VV VX VZ WW AQ AR AU BB BN BV CP HH HO HZ KQ MX (r) MY (y³) MZ NO NP NS (h¹) NX OU (L₁) OS OW (z) OX PQ PR PT PU (m) PV PX PY QS QU QW (I) QX QY QZ (b) V336 V338 V339 V347 V348 V351 V363 V368 V376 V378 V390 V392 V397 V420 V436 V438 V443 V445 V468 (d⁴) V510 V574 V575 V596 V597 V598
HR	2157 2158 2178 2187 2204 2211 2348 (G) 2384 2462 (v) 2475 2482 2488 2518 (x) 2548 (X) 2549 2558 2563 2579 2594 2604 2608 2612 2619 (t) 2626 2641 2658 2666 (C) 2667 2668 2672 (H) 2677 2685 2687 2691 (D) 2702 (A) 2719 2727 (E) 2759 2762 2769 2770 2771 2789 (M) 2791 (F) 2794 2829 2856 2860 2863 2868 2870 2873 2874 2875 (y) 2881 2895 2897 2899 2900 2906 2909 (n) 2910 (n) 2913 2916 2922 (p) 2923 2933 2937 (f) 2940 (y²) 2945 2948 (k¹) 2949 (k²) 2954 (e) 2955 2956 2959 2960 2961 (d¹) 2963 (d²) 2964 (d³) 2976 2981 2984 2988 2994 2998 3001 3002 (W) 3007 3011 3017 (c) 3018 3019 3020 3023 3027 3035 3037 3042 3043 3046 (Q) 3051 3052 3055 (P) 3057 3060 3068 3069 3071 3074 3079 3080 (a) 3085 3089 3090 (J) 3091 3092 3096 3101 3111 3114 3116 (N) 3118 3121 (O) 3131 3137 3140 3142 3143 3148 3154 3155 3160 3166 3177 3183 3190 3194 3199 3205 3219 3226 3233 3238 3239 3241 3242 3243 (h²) 3251 3253 3259 3261 3266 3270 (q) 3273 3276 3279 3281 3282 (w) 3283 3286 3291 3308 3315 3316 3317 3320 3324 3326
HD	44594 48265 (Nosaxa) 49798 50499 53680 59235 61005 61589 61750 62542 63291 63399 63696 63734 63754 65638 66885 67408 69904 70642
Other	2MASS 0729−39 2MASS J08152329-3859234 Bran 76 Gliese 257 Gliese 283 Gliese 300 L 745-46A NGC 2423-3 Nova Puppis 1673 OH 231.8+4.2 PSR B0740−28 PSR B0808−13 PSR J0737−3039 PSR J0738−4042 RX J0812.4−3114 RX J0822−4300 SCR J0740−4257 SWIFT J0732.5−1331 4U 0728-25 WASP-121 WD 0810–353

Exoplanets	HD 48265 b (Naqaỹa) HD 50499 b HD 60532 b c HD 69830 b c d HD 70642 b WASP-121b (Tylos)

Star
clusters

NGC	2298 2439 2451 2477 2509 2527 2539 2546
Other	Arp-Madore 2 Collinder 135

Nebulae

NGC	2438 2440 2452 2467
Other	Calabash Nebula Gum Nebula

Galaxies

NGC	2328 2525

See also

References

External links