2006 RH120

2006 RH120

2006 RH120是一顆直徑大約5米的近地小行星的臨時名字,它通常都是繞著太陽公轉,但是大約每20年左右會接近地月系統一次。

除了通常看到的月亮,地球還有一個臨時的"月亮第二",也在以小行星的形式圍繞地球鏇轉,2006 RH120就是這樣的"迷你月亮"。

  • 中文名稱
    2006 RH120
  • 別稱
    迷你月亮
  • 分類
  • 直徑
    5米
  • 公轉周期
    20年

發現背景

月球由于自轉和公轉的特點,始終以同一側面面向地球。這一面相對光滑,擁有古老岩漿形成的較平坦、黑暗的低矮平地。上世紀60年代,天文學家借助航天器發現遠離我們的月亮“背面”的秘密,那裏布滿崎嶇山脈和火山口。美國加州大學的艾瑞克·阿斯帕和瑞士伯恩大學的馬丁·徹奇希在2011年8月發表在《自然》上的文章中提出,通過研究發現,在遠古時期,地球已擁有兩個月亮,其中一個非常微小,另一個則是我們今天看到的月球。二者發生低速碰撞後合二為一,因此形成了月球今天的外貌。這個理論可以用來解釋為什麽探測器發現月球背面與面朝地球的一面會有如此大的差異。而在此之前,曾有科學家指出,月球背面與面朝地球一面之所以不同,隻是由于引力的作用所致,而不是碰撞的結果。

天文專家認為,月球起源于太陽系形成早期,是一顆火星大小的天體碰撞地球後產生的碎片在重力作用下形成的。2011年8月,科學期刊《自然》又刊登了一篇文章,提出一個月球起源新觀點:月球背面之所以與面向地球那一面外貌相去甚遠,正是因為它與另一個“月亮第二”相撞的結果。

科學家稱,當地球圍繞太陽旋轉,經過微小的小行星的時候,地球的引力將可能捕獲它們。當它們當中的一個被吸引,圍繞地球旋轉時,當它的旋轉軌道不規則地搖擺著,與月亮軌道重合時,它會被對方猛烈撞擊,最終脫離地球的吸引,回到外太空。有研究小組甚至觀察到,自2006年9月開始至2007年7月,就曾經有一顆臨時小行星圍繞地球旋轉了將近一年的時間。

軌道

epoch2015-06-27.0

epoch JD2457200.5

perihelion date2015-04-03.03465

perihelion JD2457115.53465

argument of perihelion (°)10.10579

ascending node (°)51.15673

inclination (°)0.59508

eccentricity0.0244978

perihelion distance (AU)1.0078830

Tisserand w.r.t. Jupiter5.9

ΔV w.r.t. Earth (km/sec)3.8

semimajor axis (AU)1.0331940

mean anomaly (°)79.73939

mean daily motion (°/day)0.93849300

aphelion distance (AU)1.059

period (years)1.05

P-vector [x]0.48080455

P-vector [y]0.80374714

P-vector [z]0.35045330

Q-vector [x]-0.87679048

Q-vector [y]0.43702507

Q-vector [z]0.20061790

absolute magnitude29.5

phase slope0.15

uncertainty1

referenceMPO 133066

observations used133

oppositions2

arc length (days)281

first opposition used2006

last opposition used2007

residual rms (arc-secs)0.80

perturbers coarse indicatorM-v

perturbers precise indicator003Eh

first observation date used2006-09-14.0

last observation date used2007-06-22.0

computer nameChodas

觀察

Date (UT)J2000 RAJ2000 DecMagnLocationRef
2006 09 14.2706223 11 31.09-07 31 12.519.3 V703 – Catalina Sky SurveyMPS 239158
2006 09 14.2770423 11 33.36-07 32 30.618.9 V703 – Catalina Sky SurveyMPS 239158
2006 09 14.2834623 11 35.62-07 33 46.719.2 V703 – Catalina Sky SurveyMPS 239158
2006 09 14.2898823 11 38.04-07 35 02.319.0 V703 – Catalina Sky SurveyMPS 239158
2006 09 14.3153123 11 46.80-07 39 57.319.8 V703 – Catalina Sky SurveyMPS 239158
2006 09 14.3224423 11 49.38-07 41 20.419.5 V703 – Catalina Sky SurveyMPS 239158
2006 09 14.3295723 11 51.97-07 42 42.319.5 V703 – Catalina Sky SurveyMPS 239158
2006 09 14.5724423 15 51.66-08 03 15.819.4 RE12 – Siding Spring SurveyMPS 239158
2006 09 14.5748023 15 52.42-08 03 42.619.9 RE12 – Siding Spring SurveyMPS 239158
2006 09 15.3008223 26 45.63-10 49 35.719.1 R854 – Sabino Canyon Observatory, TucsonMPS 239158
2006 09 15.3055123 26 47.15-10 50 28.719.5 R854 – Sabino Canyon Observatory, TucsonMPS 239158
2006 09 15.3102023 26 48.83-10 51 20.919.1 R854 – Sabino Canyon Observatory, TucsonMPS 239158
2006 09 16.3049623 41 43.40-13 55 26.519.0 V703 – Catalina Sky SurveyMPS 239158
2006 09 16.3056523 41 43.69-13 55 34.419.4 V703 – Catalina Sky SurveyMPS 239158
2006 09 16.3063523 41 43.94-13 55 41.219.1 V703 – Catalina Sky SurveyMPS 239158
2006 09 16.3070523 41 44.19-13 55 48.519.7 V703 – Catalina Sky SurveyMPS 239158
2006 09 16.6086523 46 00.19-14 24 22.219.3 VE12 – Siding Spring SurveyMPS 239158
2006 09 16.6091923 46 00.30-14 24 27.218.9 VE12 – Siding Spring SurveyMPS 239158
2006 09 16.6097123 46 00.51-14 24 32.720.0 VE12 – Siding Spring SurveyMPS 239158
2006 09 16.6102623 46 00.73-14 24 38.719.6 VE12 – Siding Spring SurveyMPS 239158
2006 09 16.6107923 46 00.91-14 24 44.419.0 VE12 – Siding Spring SurveyMPS 239158
2006 09 16.6127323 46 01.48-14 25 04.120.0 VE12 – Siding Spring SurveyMPS 239158
2006 09 16.6132623 46 01.70-14 25 11.119.4 VE12 – Siding Spring SurveyMPS 239158
2006 09 16.6138323 46 01.88-14 25 15.919.7 VE12 – Siding Spring SurveyMPS 239158
2006 09 16.6143623 46 02.06-14 25 21.619.4 VE12 – Siding Spring SurveyMPS 239158
2006 09 16.6149023 46 02.28-14 25 27.919.5 VE12 – Siding Spring SurveyMPS 239158
2006 09 17.3031123 56 31.55-16 51 01.619.3 V703 – Catalina Sky SurveyMPS 239158
2006 09 17.3052923 56 32.28-16 51 23.519.3 V703 – Catalina Sky SurveyMPS 239158
2006 09 17.3074423 56 33.02-16 51 45.319.8 V703 – Catalina Sky SurveyMPS 239158
2006 09 18.6032100 15 21.53-20 00 10.319.5 RE12 – Siding Spring SurveyMPS 239158
2006 09 18.6056700 15 22.33-20 00 33.819.4 RE12 – Siding Spring SurveyMPS 239158
2006 09 18.7058600 15 57.74-20 14 51.119.5 RE12 – Siding Spring SurveyMPS 239158
2006 09 18.7080800 15 58.68-20 15 08.819.2 RE12 – Siding Spring SurveyMPS 239158
2006 09 21.6719100 58 22.27-27 05 33.6
  
E12 – Siding Spring SurveyMPS 239158
2006 09 21.6745600 58 23.12-27 05 49.6
  
E12 – Siding Spring SurveyMPS 239158
2006 09 22.3607801 08 09.32-28 45 54.6
  
693 – Catalina Station, TucsonMPS 239158
2006 09 22.3614101 08 09.45-28 45 59.4
  
693 – Catalina Station, TucsonMPS 239158
2006 09 22.3627101 08 09.79-28 46 06.319.5 R693 – Catalina Station, TucsonMPS 239158
2006 09 23.6281401 25 21.23-30 37 06.320.1 RE12 – Siding Spring SurveyMPS 239158
2006 09 23.6378401 25 23.76-30 38 04.020.2 RE12 – Siding Spring SurveyMPS 239158
2006 09 25.7783101 51 59.25-33 35 42.120.6 RE12 – Siding Spring SurveyMPS 239158
2006 09 26.6736502 03 54.67-34 39 50.120.7 RE12 – Siding Spring SurveyMPS 239158
2006 09 26.6807402 03 56.19-34 40 14.620.5 RE12 – Siding Spring SurveyMPS 239158
2006 09 28.6780902 27 40.30-36 30 15.920.3 RE12 – Siding Spring SurveyMPS 239158
2006 09 28.6877602 27 42.12-36 30 39.320.4 RE12 – Siding Spring SurveyMPS 239158
2006 12 11.2940406 59 16.86+08 10 53.520.6 V291 – LPL/Spacewatch IIMPS 239158
2006 12 11.2994106 59 15.06+08 11 39.620.9 V291 – LPL/Spacewatch IIMPS 239158
2006 12 11.3049406 59 13.10+08 12 29.020.4 V291 – LPL/Spacewatch IIMPS 239158
2006 12 12.3711806 59 10.84+10 47 18.6
  
G96 – Mt. Lemmon SurveyMPS 239158
2006 12 12.3837406 59 05.41+10 49 11.5
  
G96 – Mt. Lemmon SurveyMPS 239158
2006 12 12.3969106 58 59.88+10 51 06.6
  
G96 – Mt. Lemmon SurveyMPS 239158
2006 12 12.4130006 58 53.09+10 53 28.4
  
G96 – Mt. Lemmon SurveyMPS 239158
2006 12 13.3245506 59 51.70+13 14 40.420.3 V291 – LPL/Spacewatch IIMPS 239158
2006 12 13.3302906 59 49.26+13 15 38.220.6 V291 – LPL/Spacewatch IIMPS 239158
2006 12 13.3359906 59 46.78+13 16 33.0
  
291 – LPL/Spacewatch IIMPS 239158
2006 12 16.3425007 00 04.72+22 06 41.120.0 VG96 – Mt. Lemmon SurveyMPS 239158
2006 12 16.3464007 00 02.61+22 07 27.919.7 VG96 – Mt. Lemmon SurveyMPS 239158
2006 12 16.3563306 59 57.25+22 09 26.219.9 VG96 – Mt. Lemmon SurveyMPS 239158
2006 12 16.3566306 59 57.09+22 09 29.519.4 VG96 – Mt. Lemmon SurveyMPS 239158
2006 12 16.3569606 59 56.87+22 09 33.920.0 VG96 – Mt. Lemmon SurveyMPS 239158
2006 12 17.2840907 00 29.51+25 15 15.319.9 VG96 – Mt. Lemmon SurveyMPS 239158
2006 12 17.2877207 00 27.66+25 16 05.719.8 VG96 – Mt. Lemmon SurveyMPS 239158
2007 03 11.86164806 44 03.457-29 38 19.0319.7 VB31 – Southern African Large Telescope, SutherlandMPS 239158
2007 03 11.86251406 44 03.077-29 38 07.3019.3 VB31 – Southern African Large Telescope, SutherlandMPS 239158
2007 03 11.86280106 44 02.933-29 38 03.0919.6 VB31 – Southern African Large Telescope, SutherlandMPS 239158
2007 03 11.86308706 44 02.823-29 37 59.4019.5 VB31 – Southern African Large Telescope, SutherlandMPS 239158
2007 03 11.86379906 44 02.507-29 37 49.5119.0 VB31 – Southern African Large Telescope, SutherlandMPS 239158
2007 03 11.86494706 44 02.009-29 37 33.7919.6 VB31 – Southern African Large Telescope, SutherlandMPS 239158
2007 03 11.86662206 44 01.204-29 37 10.4319.9 VB31 – Southern African Large Telescope, SutherlandMPS 239158
2007 03 11.86804906 44 00.631-29 36 50.7519.9 VB31 – Southern African Large Telescope, SutherlandMPS 239158
2007 03 11.86972706 43 59.939-29 36 27.4819.7 VB31 – Southern African Large Telescope, SutherlandMPS 239158
2007 03 11.87115406 43 59.315-29 36 07.7920.1 VB31 – Southern African Large Telescope, SutherlandMPS 239158
2007 03 15.1229906 47 23.35-18 05 46.2
  
G96 – Mt. Lemmon SurveyMPS 239158
2007 03 15.1247506 47 22.26-18 05 16.8
  
G96 – Mt. Lemmon SurveyMPS 239158
2007 03 15.1264906 47 21.08-18 04 48.7
  
G96 – Mt. Lemmon SurveyMPS 239158
2007 03 15.1291306 47 19.60-18 04 08.5
  
G96 – Mt. Lemmon SurveyMPS 239158
2007 03 15.83352406 47 14.292-14 17 18.5920.0 VB31 – Southern African Large Telescope, SutherlandMPS 239158
2007 03 15.84036106 47 10.728-14 15 10.5619.9 VB31 – Southern African Large Telescope, SutherlandMPS 239158
2007 03 15.84852906 47 06.636-14 12 36.84
  
B31 – Southern African Large Telescope, SutherlandMPS 239158
2007 03 15.85445506 47 03.816-14 10 44.4720.0 VB31 – Southern African Large Telescope, SutherlandMPS 239158
2007 03 15.86131606 47 00.629-14 08 34.2319.7 VB31 – Southern African Large Telescope, SutherlandMPS 239158
2007 03 16.81518106 48 28.393-09 14 05.5119.5 VB31 – Southern African Large Telescope, SutherlandMPS 239158
2007 03 16.81871906 48 26.354-09 12 52.9220.2 VB31 – Southern African Large Telescope, SutherlandMPS 239158
2007 03 16.82198706 48 24.583-09 11 45.3419.8 VB31 – Southern African Large Telescope, SutherlandMPS 239158
2007 03 16.82525606 48 22.741-09 10 37.8320.0 VB31 – Southern African Large Telescope, SutherlandMPS 239158
2007 03 16.82779206 48 21.408-09 09 44.9619.8 VB31 – Southern African Large Telescope, SutherlandMPS 239158
2007 03 16.83031106 48 19.959-09 08 53.39
  
B31 – Southern African Large Telescope, SutherlandMPS 239158
2007 03 16.83284606 48 18.597-09 08 00.9619.6 VB31 – Southern African Large Telescope, SutherlandMPS 239158
2007 03 16.83537206 48 17.249-09 07 08.3019.9 VB31 – Southern African Large Telescope, SutherlandMPS 239158
2007 03 16.83867006 48 15.490-09 05 59.5720.2 VB31 – Southern African Large Telescope, SutherlandMPS 239158
2007 03 16.84620906 48 11.611-09 03 22.0519.7 VB31 – Southern African Large Telescope, SutherlandMPS 239158
2007 03 16.84870506 48 10.373-09 02 30.2619.6 VB31 – Southern African Large Telescope, SutherlandMPS 239158
2007 03 16.85119106 48 09.084-09 01 39.3019.7 VB31 – Southern African Large Telescope, SutherlandMPS 239158
2007 03 16.85368206 48 07.932-09 00 46.1319.9 VB31 – Southern African Large Telescope, SutherlandMPS 239158
2007 03 17.79998106 49 55.890-03 25 22.3319.5 VB31 – Southern African Large Telescope, SutherlandMPS 239158
2007 03 17.80214706 49 54.510-03 24 32.0919.8 VB31 – Southern African Large Telescope, SutherlandMPS 239158
2007 03 17.80644706 49 51.814-03 22 53.4719.7 VB31 – Southern African Large Telescope, SutherlandMPS 239158
2007 03 17.80763406 49 51.073-03 22 26.3419.7 VB31 – Southern African Large Telescope, SutherlandMPS 239158
2007 03 17.80883806 49 50.333-03 21 58.0119.7 VB31 – Southern African Large Telescope, SutherlandMPS 239158
2007 03 17.81004406 49 49.593-03 21 30.6620.0 VB31 – Southern African Large Telescope, SutherlandMPS 239158
2007 03 17.81363706 49 47.448-03 20 07.4019.8 VB31 – Southern African Large Telescope, SutherlandMPS 239158
2007 03 17.82135906 49 42.909-03 17 08.3319.3 VB31 – Southern African Large Telescope, SutherlandMPS 239158
2007 03 17.82400706 49 41.393-03 16 07.0619.8 VB31 – Southern African Large Telescope, SutherlandMPS 239158
2007 03 18.80519006 51 30.381+03 27 31.8619.9 VB31 – Southern African Large Telescope, SutherlandMPS 239158
2007 03 18.80543106 51 30.217+03 27 39.1919.8 VB31 – Southern African Large Telescope, SutherlandMPS 239159
2007 03 18.80772706 51 28.733+03 28 39.6019.6 VB31 – Southern African Large Telescope, SutherlandMPS 239159
2007 03 20.9526606 56 21.83+21 30 51.718.7 RJ95 – Great SheffordMPS 239159
2007 03 20.9588906 56 20.43+21 34 27.919.2 RJ95 – Great SheffordMPS 239159
2007 03 20.9654506 56 19.15+21 38 16.018.7 RJ95 – Great SheffordMPS 239159
2007 03 20.9725106 56 17.93+21 42 20.819.0 RJ95 – Great SheffordMPS 239159
2007 03 20.9785006 56 17.01+21 45 47.619.2 RJ95 – Great SheffordMPS 239159
2007 03 20.9846606 56 16.28+21 49 20.219.3 RJ95 – Great SheffordMPS 239159
2007 06 15.95047420 20 10.06+62 30 18.320.3 RJ95 – Great SheffordMPS 239159
2007 06 15.95565920 20 03.14+62 24 28.619.7 RJ95 – Great SheffordMPS 239159
2007 06 15.95984520 19 57.22+62 19 47.120.2 RJ95 – Great SheffordMPS 239159
2007 06 15.97969420 19 27.19+61 57 21.219.0 RJ95 – Great SheffordMPS 239159
2007 06 18.9530820 18 40.91+16 57 22.919.0 RJ95 – Great SheffordMPS 239159
2007 06 18.9549120 18 40.11+16 56 23.419.0 RJ95 – Great SheffordMPS 239159
2007 06 18.9575920 18 38.98+16 54 54.419.1 RJ95 – Great SheffordMPS 239159
2007 06 18.9596420 18 38.03+16 53 46.519.2 RJ95 – Great SheffordMPS 239159
2007 06 18.9613520 18 37.26+16 52 49.518.9 RJ95 – Great SheffordMPS 239159
2007 06 18.9965120 18 18.54+16 33 23.218.7 RJ95 – Great SheffordMPS 239159
2007 06 18.9985820 18 17.27+16 32 14.318.6 RJ95 – Great SheffordMPS 239159
2007 06 19.0003920 18 16.23+16 31 14.318.6 RJ95 – Great SheffordMPS 239159
2007 06 19.0023620 18 15.11+16 30 07.918.7 RJ95 – Great SheffordMPS 239159
2007 06 20.9744120 18 22.97+00 50 00.119.7 RJ95 – Great SheffordMPS 239159
2007 06 20.9805120 18 20.39+00 47 40.619.3 RJ95 – Great SheffordMPS 239159
2007 06 20.9860520 18 17.98+00 45 32.619.7 RJ95 – Great SheffordMPS 239159
2007 06 21.0269720 17 58.02+00 29 52.419.1 RJ95 – Great SheffordMPS 239159
2007 06 22.3145920 18 19.44-06 42 29.319.2 VG96 – Mt. Lemmon SurveyMPS 239159
2007 06 22.3204520 18 15.76-06 44 21.119.1 VG96 – Mt. Lemmon SurveyMPS 239159
2007 06 22.3260320 18 12.24-06 46 06.619.3 VG96 – Mt. Lemmon SurveyMPS 239159

天文資料

2006RH120是在亞利桑那州圖森市卡特琳娜天空觀測站被發現到的,被命名為2006RH120,估計直徑隻有5米。它通常都是繞著太陽公轉,但是每20年左右會接近“地月系”一次。“2006RH120能夠被發現,是因為它比其他的‘臨時月亮’更大一點,後來大部分進入到地球軌道的小行星都隻有大約1米寬。

運動特點

偶爾這個天體會短暫的進入臨時衛星捕獲(temporary satellite capture,TSC),在臨時衛星捕獲期間,流星體可以是除了月球之外的另一顆天然衛星。2006RH120在臨時軌道上打轉幾個迴圈,然後就打包一走了之的幾個輕如鴻毛的小不點是衛星。2006RH120最近在2006年9月到2007年7月是在地球軌道上的小不點,直到2008年2月18日才給了小行星的名稱,就是所知的6R10DB9,卡特林那巡天系統的內部辨識名稱。

來源爭議

2006RH120的來源仍存在著一些爭議。發現後,因為他的大小、軌道和光譜 - 符合農神五號火箭使用的鈦白氧化塗料 - 而沒有給予正式的名稱,建議它可能是一個人造的物體。存在的一個先例是幾乎在完全一樣軌道上的J002E3,目前認為它是阿波羅12號的農神S-IVB第三節的助推器。

相關詞條

相關搜尋

其它詞條