Miraç (yıldız)

Miraç (β Andromedae)
Miraç, merkezin hemen solunda.
Gözlem verisi
Dönem J2000.0      Ekinoks J2000.0
TakımyıldızAndromeda
Sağ açıklık (α)01sa 09d 43.9236s[1]
Dik açıklık (δ)+35° 37′ 14.008″[1]
Görünür büyüklük (V)2.01 to 2.10[2]
Sınıflandırma
Tayfsal sınıf
M0III[1]
U−B renk ölçeği+1.96[3]
B−V renk ölçeği+1.58[3]
Değişen yıldız tipiYarıdüzenli[2]
Astrometri
Dikey hız ()0.3 ± 0.9[1] km/s
Özdevinim (μ)RA: 175.59[1] mys/y
Dec.: −112.23[1] mys/y
Iraklık açısı (π)16.36 mys
Uzaklık200 Iy
Mutlak büyüklük (V)−1.9
Özellikler
Kütle (m)3–4[4] M☉
Yarıçap (r)90[4] R☉
Aydınlatma gücü1,900[4] L⊙
Sıcaklık3,800[4] K
Katalog belirtmeleri
Mirach, Merach, Miraç, Mizar, β And, Beta Andromedae, Beta And, 43 Andromedae, 43 And, BD+34°198, FK5 42, GJ 53.3, GJ 9044, HD 6860, HIP 5447, HR 337, LTT 10420, NLTT 3848, SAO 54471, WDS 01097+3537A.[1][5]

Miraç, Beta Andromedae (Beta ve / β ve / β Andromedae) Andromeda takımyıldızı yönünde bulunan bir kırmızı dev yıldızdır. tayfsal sınıfı M0 olan yıldız, yaklaşık olarak 200 ışık yılı uzaklıkta bulunmaktadır.[1] Görünür parlaklığı +2.01 ile +2.10 arasındadır ve şüpheli yarıdüzenli değişen yıldız olarak sınıflandırılır.[2]

Gözlem

Kanatlıat'ın Büyük Kare'sinden yukarı sola yani kuzeydoğusuna uzanıldığında, Andromeda takımyıldızına varılır. Miraç, Almaç ve takımyıldızın geriye kalan ana yıldızları Büyük Kare'den uzaklaşak yönde sıralanmışlardır.

NGC 404 gökadası ki Miraç'ın hayaleti olarak da bilinir yedi yay-dakika uzaklıkta gözlenebilir.[6]

Kaynakça

  1. ^ a b c d e f g h NAME MIRACH -- Variable Star, SIMBAD veritabanı. 12 Ağustos 2008 tarihinde erişilmiştir.
  2. ^ a b c NSV 414 19 Mayıs 2011 tarihinde Wayback Machine sitesinde arşivlendi., database entry, table of suspected variable stars, Combined General Catalog of Variable Stars (GCVS4.2, 2004 Ed.), N. N. Samus, O. V. Durlevich, et al., Centre de Données astronomiques de Strasbourg ID II/250 1 Temmuz 2015 tarihinde Wayback Machine sitesinde arşivlendi..
  3. ^ a b HR 337 19 Mayıs 2011 tarihinde Wayback Machine sitesinde arşivlendi., database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50 3 Mart 2016 tarihinde Wayback Machine sitesinde arşivlendi.. Accessed on line August 12, 2008.
  4. ^ a b c d Mirach 16 Aralık 2008 tarihinde Wayback Machine sitesinde arşivlendi., Stars, Jim Kaler. 13 Ağustos 2008 tarihinde erişilmiştir.
  5. ^ (İngilizce) Richard Hinckley Allen (1899) Star-names and Their Meanings, s. 36.
  6. ^ Mirach's Ghost (NGC 404) 18 Mayıs 2019 tarihinde Wayback Machine sitesinde arşivlendi., The Internet Encyclopedia of Science, David Darling. 15 Ağustos 2008 tarihinde erişilmiştir.

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