125 Liberatrix

125 Liberatrix
Işık eğrisine dayalı olarak 125 Liberatrix'in üç boyutlu modeli.
Keşif
KeşfedenPaul Henry ve Prosper Henry
Keşif tarihi11 Eylül 1872
Adlandırmalar
MPC belirtmesi(125) Liberatrix
Telaffuz/ˈlɪbərtrɪks/[1]
Alternatif adlandırma
A872 RA; 1902 EG;
1943 FE; 1949 OE1;
1949 SM; 1954 TD1
Asteroit kuşağı
(Liberatrix ailesi)
Yörünge özellikleri[2]
Dönem 31 Temmuz 2016 (JG 2.457.600,5)
Belirsizlik parametresi 0
Gözlem yayı143,54 yıl (52.428 gün)
Günöte2,95698 AU (442,358 Gm)
Günberi2,53084 AU (378,608 Gm)
2,74391 AU (410,483 Gm)
Dış merkezlik0,077651
4,55 yıl (1.660,2 gün)
17,96 km/s
307,971°
0° 13d 0.642s / gün
Eğiklik4,66407°
169,003°
109,288°
Dünya MOID1,51912 AU (227,257 Gm)
Jüpiter MOID2,13019 AU (318,672 Gm)
TJüpiter3,340
Fiziksel özellikler
M (Tholen)[3]
9,04,[2] 8,90[3]
Boyutlar43,58±2,3 km[2]
61,058 km[3]
Kütle8,7×1016 kg
Ortalama yoğunluk
2,0 g/cm3
Ekvatoral yerçekimi
0,0122 m/s2
Ekvatoral kurtulma hızı
0,0231 km/s
3,968 sa (0,1653 g)[2][4]
0,2253±0,026[2]
0.1305 ± 0.0269[3]
Sıcaklık~168 K
  Wikimedia Commons'ta ilgili ortam

Liberatrix (küçük gezegen tanımı: 125 Liberatrix) bir ana kuşak asteroididir. Nispeten yansıtıcı bir yüzeye ve M tipi bir spektruma sahiptir. Liberatrix, kendi adını taşıyan bir asteroit ailesinin üyesidir.

11 Eylül 1872'de Paris'te Prosper Henry tarafından keşfedildi. Bazı kaynaklar, keşif sahibib olarak kardeşi Paul Henry'i de anar.[5] Asteroidin adı, "liberator (kurtarıcı)" kelimesinin kadınsı bir versiyonudur. Henry, 1870'deki Fransa-Prusya Savaşı sırasında Fransa'nın Prusya'dan kurtuluşunu kutlamak için bu adı seçmiş olabilir. Daha spesifik olarak, Prusya birliklerinin Fransa'dan çıkarılmasını sağlayan bir maddi desteği ayarlayan Fransız Cumhuriyeti'nin ilk Cumhurbaşkanı Adolphe Thiers'i onurlandırmış olabilir.[5]

1990'ların sonlarında, dünya çapındaki bir gök bilimciler ağı, Liberatrix de dahil olmak üzere 10 asteroitin dönüş durumlarını ve şekil modellerini türetmek için ışık eğrisi verilerini topladı. Liberatrix'in ışık eğrisi, uzamış veya düzensiz bir şekle işaret eden 0,4 kadirlik büyük bir genliğe sahiptir.[4][6]

Bu asteroitin spektrumu M-tipi bir asteroit ile eşleşiyor. Yüzey boyunca eşit olarak dağılmış ortopiroksen mineralleri ile farklılaşma geçirmiş bir asteroidin kalıntısı olabilir. Hidrasyon belirtisi yoktur.[7]

Bugüne kadar, Liberatrix tarafından gözlemlenen en az iki örtülme yaşanmıştır. 11 Aralık 2014'ün başlarında, Liberatrix'in 9'uncu kadir bir yıldızı gizlemesi, Güney Kaliforniya'nın büyük bir kısmından ve Meksika'nın bir bölümünde görülebildi.

Kaynakça

Kaynakça

  1. ^ "liberatrix". Lexico UK English Dictionary. Oxford University Press. 22 Mart 2020 tarihinde kaynağından arşivlendi. 
  2. ^ a b c d e Yeomans, Donald K., "125 Liberatrix", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, 17 Ağustos 2014 tarihinde kaynağından arşivlendi, erişim tarihi: 12 Mayıs 2016. 
  3. ^ a b c d Pravec, P.; Harris, A. W.; Kusnirak, P.; Galad, A.; Hornoch, K. (Mayıs 2012), "Absolute Magnitudes of Asteroids and a Revision of Asteroid Albedo Estimates from WISE Thermal Observations", Asteroids, Comets, Meteors 2012, Proceedings of the conference held May 16–20, 2012 in Niigata, Japan (1667), Bibcode:2012LPICo1667.6089P. 
  4. ^ a b Durech, J.; Kaasalainen, M.; Marciniak, A. (Nisan 2007), "Physical models of ten asteroids from an observers' collaboration network", Astronomy and Astrophysics, 465 (1), ss. 331-337, Bibcode:2007A&A...465..331D, doi:10.1051/0004-6361:20066347. 
  5. ^ a b Schmadel Lutz D. Dictionary of Minor Planet Names (fifth edition), Springer, 2003. 3-540-00238-3
  6. ^ Durech, J.; Kaasalainen, M.; Marciniak, A.; Allen, W. H. et al.
  7. ^ Hardersen, Paul S.; Gaffey, Michael J.; Abell, Paul A. (Ocak 1983), "Near-IR spectral evidence for the presence of iron-poor orthopyroxenes on the surfaces of six M-type asteroids", Icarus, 175 (1), ss. 141-158, Bibcode:2005Icar..175..141H, doi:10.1016/j.icarus.2004.10.017. 

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