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NGC 2516

NGC 2516
Açık yıldız kümesi NGC 2516
Gözlem verisi (Dönem J2000)
TakımyıldızKarina
Sağ açıklık (α)07sa 58d 04s[1]
Dik açıklık (δ)-60° 45′ 12″[1]
SınıflandırmaI3r[2]
Açısal boyut ()30.0″[3]
Görünür büyüklük (V)3,8[2]
Görünür büyüklük (B)3,8[2]
Özellikler
Uzaklık[dönüştürme: geçersiz sayı]
Kütle (m)105 - 106 M
Keşif
Nicolas Lacaille (1751)
Katalog belirtmeleri
NGC 2516 • C96 • OCL 776 • ESO 124-SC6
  Wikimedia Commons'ta ilgili ortam
Ayrıca bakınız: Açık yıldız kümesi, Liste

NGC 2516, Yeni Genel Katalog'da yer alan bir açık yıldız kümesidir. Gökyüzünde Karina takımyıldızı yönünde yaklaşık olarak 1.300 ışık yılı uzaklıkta bulunur. Fransız astronom Nicolas Lacaille tarafından 1751 yılında 1,27 cm (0,50 in) çaplı mercekli tip bir teleskopla keşfedilmiştir.[4]

Özellikler

NGC 2516, yıldızlarının netliğinden dolayı "Elmas Kümesi" olarak da adlandırılır. Yakın zamanlarda Yılancı takımyıldızı içerisinde keşfedilen yıldız kümesi Mamajek 2 ile benzer yaş ve metallik özelliklerine sahiptir. Son zamanlarda E. Jilinksi ve diğer astronomlerin ortaya koymuş olduğu kinematik kanıtlar, bu iki yıldız kümesinin de aynı yıldız oluşum kompleksinde 135 milyon yıl önce oluşmuş olabileceğini düşündürmektedir.[5]

Gözlem bilgisi

NGC 2516'nın gökyüzündeki konumunu gösteren harita

NGC 2516, güneyküre takımyıldızı olan Karina yönünde olduğu için Türkiye'den gözlemlenme imkânı yoktur. Küme, iyi gözlem koşullarında çıplak gözle kolayca gözlemlenebilir fakat bir dürbün ile çok daha iyi bir görüntü sunacaktır. Elmas Kümesi, 5. kadir'den iki güzel kırmızı dev ile üç tane çift yıldız içerir. Çift yıldızları ayırt edebilmek için küçük bir teleskop gereklidir.

Kaynakça

  1. ^ a b "SIMBAD". NGC 2516 (İngilizce). 4 Mart 2016 tarihinde kaynağından arşivlendi. Erişim tarihi: 18 Mart 2011. 
  2. ^ a b c "SEDS". NGC 2516 için gözden geçirilmiş NGC verileri (İngilizce). Erişim tarihi: 18 Mart 2011. 
  3. ^ "NASA/IPAC Dış Galaksi Veritabanı". NGC 2516 cismi için NED sonuçları (İngilizce). Erişim tarihi: 18 Mart 2011. 
  4. ^ "NGC/IC Proje Veritabanı". NGC 2516 (İngilizce). 26 Mart 2016 tarihinde kaynağından arşivlendi. Erişim tarihi: 18 Mart 2011. 
  5. ^ Jilinski, E., Ortega, V.G., de la Reza, R., Drake, N.A., and Bazzanella, B. (2009). "Dynamical Evolution and Spectral Characteristics of the Stellar Group Mamajek 2". Astrophysical Journal. 691 (1). s. 212. Bibcode:2009ApJ...691..212J. doi:10.1088/0004-637X/691/1/212. 

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