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66 Eridani

66 Eridani
Irmak takımyıldızı'nın sınırlarını ve yıldızların konumlarını gösteren diyagram
66 Eridani'nin konumu (kırmızı daire içinde)
Gözlem verisi
Dönem J2000.0      Ekinoks J2000.0
TakımyıldızIrmak
Sağ açıklık (α)05sa 06d 45,65314s[1]
Dik açıklık (δ)–04° 39′ 18,5939″[1]
Görünür büyüklük (V)5,097[1]
Görünür büyüklük (B)5,050[1]
Sınıflandırma
Tayfsal sınıf
B9V+...[1]
U−B renk ölçeği-0,17[2]
B−V renk ölçeği-0,06[2]
R−I renk ölçeği-0,10[2]
Değişen yıldız tipiα² CVn değişeni[3]
Astrometri
Dikey hız ()32,60 ± 2,80[1] km/s
Özdevinim (μ)RA: 10,70 ± 0,38[4] mys/y
Dec.: -0,78 ± 0,35[4] mys/y
Iraklık açısı (π)10,56 ± 0,34[4] mys
Uzaklık308[4] Iy
(94,433[4] pc)
Mutlak büyüklük (V)0,24[5]
Özellikler
Aydınlatma gücü97,27[5] L⊙
Dikkate değer özellikler
Spektroskopik ikili
Katalog belirtmeleri
66 Eridani • EN Eri • BD-04 1044 • GC 6104 • HD 32964 • HIP 23794 • HR 1657 • PPM 215134 • SAO 150064 • TYC 5329-2016-1

66 Eridani (EN Eri), Irmak takımyıldızı içinde yer alan ve yaklaşık olarak 308 ışık yılı uzaklıkta bulunan ikili yıldızdır. α² CVn tipi bir değişen yıldız olan birincil bileşen, tayf sınıfı B9V tipi mavi ana kol yıldızıdır ve görünen parlaklığı +5,10 kadirdir.

Gökada içinde Güneş'e göre 33 km/sn'lik bir hızla hareket eder. Gökada merkezinden uzaklığı, 23.100 ile 26.000 ışık yılı aralığında tahmin edilmektedir.[4]

Kaynakça

  1. ^ a b c d e f "V* EN Eri -- Variable Star of alpha2 CVn type". SIMBAD. 23 Kasım 2015 tarihinde kaynağından arşivlendi. Erişim tarihi: 29 Nisan 2013. 
  2. ^ a b c "Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991)". 5 Mart 2016 tarihinde kaynağından arşivlendi. Erişim tarihi: 29 Nisan 2013. 
  3. ^ "alcyone software". 28 Eylül 2011 tarihinde kaynağından arşivlendi. Erişim tarihi: 29 Nisan 2013. 
  4. ^ a b c d e f "66 Eridani, a blue main-sequence star in Eridanus". 31 Ocak 2016 tarihinde kaynağından arşivlendi. Erişim tarihi: 29 Nisan 2013. 
  5. ^ a b "Extended Hipparcos Compilation (XHIP) (Anderson+, 2012)". 5 Mart 2016 tarihinde kaynağından arşivlendi. Erişim tarihi: 4 Ekim 2020. 

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