5335 Demokles

(5335) Damokles
Keşif
KeşfedenR. H. McNaught
Keşif yeriSiding Spring
Keşif tarihi18 Şubat 1991
Adlandırmalar
MPC belirtmesi(5335) Damocles
Telaffuz/ˈdæməklz/[1]
Adın kaynağı
Demokles (Yunan mitolojisi)[2]
Alternatif adlandırma
1991 DA
uzak[3]
centaur[4] · demokloid[5]
Sembol
Yörünge özellikleri[4]
Dönem 4 Eylül 2017 (JD 2458000,5)
Belirsizlik parametresi 4
Gözlem yayı1,51 y (551 g)
Günöte22,078 AU
Günberi1,5741 AU
11,826 AU
Dış merkezlik0,8669
40,67 y (14.854 g)
236,35°
0° 1d 27.12s / gün
Eğiklik61,875°
314,14°
191,26°
Mars MOID0,05787 AU[3]
TJüpiter1,149
Fiziksel özellikler
26,56[6]
13,3[4][6]
Boyutlar~ 10 km[7]
  Wikimedia Commons'ta ilgili ortam

(5335) Damocles /ˈdæməklz/ 1991 DA centaur grubuna mensup ve Halley tipi, uzun dönemli kuyruklu yıldızların etkin olmayan çekirdekleri olabileceği düşünülen bir tür küçük gezegen olan demokloidler grubunun isim babasıdır. 18 Şubat 1991'de, Avustralyalı astronom Robert McNaught tarafından Avustralya'daki Siding Spring Gözlemevi'nde keşfedilmiştir. Adını Yunan mitolojisinin bir figürü olan Demokles'ten almıştır.[2]

Özellikleri

Damocles keşfedildiğinde, bilinen tüm asteroitlerden tamamen farklı bir yörüngede olduğu anlaşılmıştır. Damocles'in yörüngesi Mars'ın günötesinin içinden Uranüs'e kadar uzanmaktadır. Dairesel yörüngesi onu dış Güneş Sisteminden iç Güneş Sistemine götüren eksantrik bir yörüngeye doğru itiyor gibiydi.[8] Duncan Steel, Gerhard Hahn, Mark Bailey ve David Asher, uzun vadeli dinamik evriminin tahminlerini yürüterek Dünya'yı geçen bir asteroit olma olasılığının yüksek olduğunu ve ömrünün dörtte birini böyle bir yörüngede geçirebileceğini keşfettiler. Damocles, günümüzden on binlerce yıl önce ve sonra istikrarlı bir yörüngeye sahiptir, çünkü oldukça eğimli yörüngesi onu gaz devleri Jüpiter veya Satürn'ün yanına yaklaştırmaz.[9][10]

Damocles'in Draco takımyıldızı yönünden Mars'a doğru, onunla ilişkili bir meteor yağmurunun kalıntısı olabileceğine dair bazı spekülasyonlar bulunmaktadır.[11] Nesnenin bir Mars minimum yörünge kesişme mesafesi (Mars MOID 0,057 astronomik birim (8.500.000 km; 5.300.000 mi) ve bir Uranüs (0,3 astronomik birim (45.000.000 km; 28.000.000 mi) MOID'i bulunmaktadır.[3]

2019 itibarıyla, Demokles Güneş'ten 19,6 AU mesafede ve görünür parlaklığı 26,3 düzeyinde bulunmaktadır.[6] Güneş'e en uzak konumuna 2011 yılında erişmiştir.

Ayrıca bakınız

Kaynakça

  1. ^ Webster, Noah (1884). A Practical Dictionary of the English Language. 
  2. ^ a b Schmadel, Lutz D. (2007). "(5335) Damocles". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. s. 457. doi:10.1007/978-3-540-29925-7_5143. ISBN 978-3-540-00238-3. 
  3. ^ a b c "(5335) Damocles (1991 DA)". Minor Planet Center. 29 Kasım 2014 tarihinde kaynağından arşivlendi. Erişim tarihi: 14 Şubat 2017. 
  4. ^ a b c "1992-08-22 last obs". (5335) Damocles (1991 DA). Jet Propulsion Laboratory. 15 Şubat 2017 tarihinde kaynağından arşivlendi. Erişim tarihi: 21 Eylül 2017. 
  5. ^ Akimasa Nakamura and bas (2 Mayıs 2009). "List of Damocloids (Oort cloud asteroids)". Lowell Observatory. 12 Mart 2016 tarihinde kaynağından arşivlendi. Erişim tarihi: 15 Şubat 2017. 
  6. ^ a b c "AstDyS Damocles Ephemerides". Department of Mathematics, University of Pisa, Italy. 1 Mayıs 2023 tarihinde kaynağından arşivlendi. Erişim tarihi: 21 Eylül 2017. 
  7. ^ Johnston, Wm. Robert (25 Mayıs 2019). "List of known trans-Neptunian objects". Johnston'sArchive.net. 13 Mart 2002 tarihinde kaynağından arşivlendi. Erişim tarihi: 31 Mayıs 2019. 
  8. ^ Steel, D. (1995). Rogue Asteroids and Doomsday Comets. Wiley & Sons. s. 127–128. 
  9. ^ Asher, David J.; Bailey; Hahn; Steel (1994). "Asteroid (5335) Damocles and its implications for cometary dynamics". Monthly Notices of the Royal Astronomical Society. Cilt 267. s. 26. Bibcode:1994MNRAS.267...26A. doi:10.1093/mnras/267.1.26. 
  10. ^ Asher, David; Bailey, Mark; Hahn, Gerhard; Steel, Duncan (27 Mayıs 1993). "Asteroid (5335) Damocles and its implications for cometary dynamics". Monthly Notices of the Royal Astronomical Society. Cilt 267. ss. 26-42. Bibcode:1994MNRAS.267...26A. doi:10.1093/mnras/267.1.26. 
  11. ^ "Meteor Showers and Their Parent Bodies". 3 Ekim 2008 tarihinde kaynağından arşivlendi. Erişim tarihi: 30 Aralık 2006. 

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