NGC 362

Kugelsternhaufen
Daten von NGC 362
Der Kugelsternhaufen NGC 362 aufgenommen von Hubble-Weltraumteleskop
(c) ESA/Hubble, CC BY 4.0
Der Kugelsternhaufen NGC 362 aufgenommen von Hubble-Weltraumteleskop
AladinLite
SternbildTukan
Position
ÄquinoktiumJ2000.0, Epoche: J2000.0
Rektaszension01h 03m 14,2s [1]
Deklination−70° 50′ 54″ [1]
Erscheinungsbild
KonzentrationsklasseIII [2]
Helligkeit (visuell)+6,40 mag [3]
Winkelausdehnung14' [4]
Farbexzess
E(B-V) (Rötung)
0,05 [3]
Physikalische Daten
ZugehörigkeitMilchstraße
Integrierter SpektraltypF9[3]
Rotverschiebung(746 ± 2) · 10−6 [5]
Radialgeschwindigkeit(+223,5 ± 0,5) km/s [5]
Entfernungca. 28000 Lj
(ca. 8500 pc) [6]
Absolute Helligkeit−8,26 mag [3]
Konzentration lg(rt/rc)1,94 [3]
Metallizität [Fe/H]−1,16 ± 0,25 [6]
Geschichte
EntdeckungJames Dunlop
Entdeckungsdatum1. August 1826
Katalogbezeichnungen
 NGC 362 • C 0100-711 • GCl 3 • ESO 51-SC13 • Mel 4 • Dun 62 • GC 193 • h 2375

NGC 362 ist die Bezeichnung für einen galaktischen Kugelsternhaufen im Sternbild Tukan am Südsternhimmel. Er liegt von der Erde aus gesehen im Vordergrund des Außenbereichs der kleinen Magellanschen Wolke und ist etwa 27.000 Lichtjahre von der Sonne entfernt. NGC 362 hat eine scheinbare Helligkeit von +6,40 mag und ihr Kernradius beträgt 0,17 Bogenminuten.

Das Objekt wurde am 1. August 1826 vom schottischen Astronomen James Dunlop entdeckt.[7]

Weblinks

Einzelnachweise

  1. NASA/IPAC EXTRAGALACTIC DATABASE
  2. Harlow Shapley, Helen B. Sawyer: A Classification of Globular Clusters. In: Harvard College Observatory Bulletin. Band 849, 1927, S. 11–14, bibcode:1927BHarO.849...11S.
  3. a b c d e William E. Harris: A Catalog of Parameters for Globular Clusters in the Milky Way. In: Astronomical Journal. Vol. 112, Oktober 1996, S. 1487f. bibcode:1996AJ....112.1487H
  4. SEDS: NGC 362
  5. SIMBAD-Datenbank
  6. a b P. Székely u. a.: RR Lyrae stars in the southern globular cluster NGC 362. In: Astronomy and Astrophysics. Vol. 463, Issue 2, Februar 2007, S. 589ff. bibcode:2007A&A...463..589S
  7. Seligman

Auf dieser Seite verwendete Medien

Caldwell Catalogue.jpg
Autor/Urheber: Roberto Mura, Lizenz: CC BY-SA 3.0
Caldwell Catalogue objects.
GALEX image of NGC 362.jpg
This image is a false color composite, where light detected by GALEX's far-ultraviolet detector is colored blue, and light from GALEX's near-ultraviolet detector is red.
NGC 362 - Potw1643a.tif
(c) ESA/Hubble, CC BY 4.0

Youthful NGC 362

Globular clusters offer some of the most spectacular sights in the night sky. These ornate spheres contain hundreds of thousands of stars, and reside in the outskirts of galaxies. The Milky Way contains over 150 such clusters — and the one shown in this NASA/ESA Hubble Space Telescope image, named NGC 362, is one of the more unusual ones.

As stars make their way through life they fuse elements together in their cores, creating heavier and heavier elements — known in astronomy as metals — in the process. When these stars die, they flood their surroundings with the material they have formed during their lifetimes, enriching the interstellar medium with metals. Stars that form later therefore contain higher proportions of metals than their older relatives.

By studying the different elements present within individual stars in NGC 362, astronomers discovered that the cluster boasts a surprisingly high metal content, indicating that it is younger than expected. Although most globular clusters are much older than the majority of stars in their host galaxy, NGC 362 bucks the trend, with an age lying between 10 and 11 billion years old. For reference, the age of the Milky Way is estimated to be above 13 billion years.

This image, in which you can view NGC 362’s individual stars, was taken by Hubble’s Advanced Camera for Surveys (ACS).

Credit:

ESA/Hubble & NASA

Coordinates
Position (RA):	1 3 14.63
Position (Dec):	-70° 50' 58.20"
Field of view:	2.63 x 2.65 arcminutes
Orientation:	North is 200.0° right of vertical
Colours & filters Band	Wavelength	Telescope
Optical B      	435 nm	Hubble Space Telescope ACS
Optical R      	625 nm	Hubble Space Telescope ACS
Optical H-alpha	658 nm	Hubble Space Telescope ACS
.