"ओमूआमूआ": अवतरणों में अंतर
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पंक्ति 1:
{{infobox planet
| minorplanet = yes
| name = ʻOumuamua
| background = #FFE0C2
| image = PIA22357-InterstellarObject-'Oumuamua-ExitsSolarSystem.jpg
| image_size = 300
| caption = <center>[[Interstellar object|Interstellar comet]] 'Oumuamua exits the [[Solar System]] (artist concept) ([https://photojournal.jpl.nasa.gov/archive/PIA22357_JPL-20180620-ASTRDSf-0007-Interstellar%20Asteroid%20animation-720p.mp4 animation])</center>
| discovery_ref =  <ref name="NASA171026" /><ref name="Discovery" />
| discoverer = [[Robert Weryk]] using {{nowrap|[[Pan-STARRS]] 1}}
| discovery_site = [[Haleakala Observatory|Haleakala Obs.]], Hawaii
| discovered = 19 October 2017
| mpc_name = 1I/2017 U1<ref name="MPEC2017-V17"/>
| alt_names = {{flatlist|
* 1I
* 1I/ʻOumuamua
* 1I/2017 U1 (ʻOumuamua)
* A/2017 U1<ref name="A2017U1" />
* C/2017 U1<ref name="Discovery" />
* P10Ee5V<ref name="spectrum"/>
}}
| pronounced = {{IPA-all|ʔouˌmuəˈmuə|IPA|audio=Haw-oumuamua.oga}}
| named_after = [[Hawaiian language|Hawaiian]] term for ''scout''<ref name="MPEC2017-V17" />
| mp_category = [[interstellar object]]<ref name="MPEC2017-V17" /><br />[[hyperbolic asteroid]]<ref name="jpldata" />
| orbit_ref =  <ref name="jpldata" />
| epoch = 2 November 2017 ([[Julian day|JD]] 2458059.5)
| observation_arc = 34 days
| perihelion = {{val|0.25534|0.00007|fmt=none}} [[Astronomical unit|AU]]
| semimajor = {{val|−1.2798|0.0008|fmt=none}} AU<ref group="Note">Objects on hyperbolic trajectories have negative semimajor axis, giving them a positive orbital energy.</ref>
| eccentricity = {{val|1.19951|0.00018|fmt=none}}
| inclination = 122.69°
| asc_node = 24.599°
| arg_peri = 241.70°
| mean_anomaly = 36.425[[Degree (angle)|°]]
| mean_motion = {{Deg2DMS|0.6802|sup=ms}} / day
| moid = 0.0959 AU{{·}}37.3 [[Lunar distance (astronomy)|LD]]
| jupiter_moid = 1.455 AU
| avg_speed = {{val|26.33|0.01|ul=km/s}} {{small|(interstellar)}}<ref name="pseudoMPEC" />
| dimensions = 230 × 35 × 35 m<br/>{{small|(est. at [[Geometric albedo|albedo]] 0.10)}}<ref name="Jewitt2017"/><ref name="NOAO2017"/>
| rotation = [[List of tumblers (small Solar System bodies)|Tumbling]] {{small|(non-principal axis rotation)}}<ref name="Fraser2018a" /><br />Reported values include: {{val|8.10|0.02}} [[Hour|h]]<ref name="Bolin2017" /><br />{{val|8.10|0.42}} h<ref name="Bannister2017" /><br />{{val|6.96|1.45|-0.39}} h<ref>{{Cite journal |title=ʻOumuamua as a messenger from the Local Association |journal=The Astrophysical Journal |volume=852 |issue=2 |pages=L27 |first1=F. |last1=Feng |first2=H. R. A. |last2=Jones |arxiv=1711.08800 |date=23 November 2017 |doi=10.3847/2041-8213/aaa404 |bibcode=2018ApJ...852L..27F}}</ref>
| albedo = 0.1 {{small|(spectral est.)}}<ref name="Jewitt2017" /><br />0.06–0.08 {{small|(spectral est.)}}<ref name="Bannister2017" />
| spectral_type = [[D-type asteroid|D]]?<ref name="Jewitt2017" /><br />[[Asteroid color indices|B–V]] = {{val|0.7|0.06}}<ref name="Jewitt2017" /><br />[[Asteroid color indices|V-R]] = {{val|0.45|0.05}}<ref name="Jewitt2017" /><br />[[Asteroid color indices|g-r]] = {{val|0.47|0.04}}<ref name="Bannister2017" /><br />[[Asteroid color indices|r-i]] = {{val|0.36|0.16}}<ref name="Bannister2017" /><br />[[Asteroid color indices|r-J]] = {{val|1.20|0.11}}<ref name="Bannister2017" />
| abs_magnitude = {{val|22.08|0.445}}<ref name="jpldata" />
| magnitude = 19.7 to >27.5<ref name="pseudoMPEC" /><ref group="Note">Range at which the object is expected to be observable. Brightness peaked at 19.7 mag on 18 October 2017, and fades below 27.5 mag (the limit of [[Hubble Space Telescope]] for fast-moving objects) around 1 January 2018. By late 2019, it should dim to 34 mag.</ref><ref name="HubbleProposal" />
}}
'''ओमूआमूआ''' (ʻOumuamua) एक [[अंतरतारकीय वस्तु]] है, यानि यह किसी तारे के गुरुत्वाकर्षक बंधन में नहीं बंधी हुई। यह हमारे [[सौर मंडल]] से होकर गुज़रने वाली पहली ज्ञात अंतरतारकीय वस्तु है। ओमूआमूआ 230 x 35 x 35 मीटर के आकार का एक कम-सक्रीय [[धूमकेतु]] है। इसका रंग बाहरी सौर मंडल की अधिकांश वस्तुओं की तरह गहरा लाल है। यह हमारे [[सूरज]] के सापेक्ष इतने तीव्र वेग से चल रहा है कि इसकी हमारे सौर मंडल में जन्म हुए होने की कोई सम्भावना नहीं है। ओमूआमूआ 19 अक्तूबर 2017 को [[हवाई]] मे स्थित एक [[वेधशाला]] द्वारा सर्वप्रथम देखा गया। इसकी गति इतनी तेज़ है कि सूरज इसे गुरुत्वाकर्षक प्रभाव से अपनी [[कक्षा (भौतिकी)|कक्षा]] में रोक सकने में सक्षम नहीं है और यह समय के साथ-साथ हमेशा के लिए हमारा सौर मंडल छोड़ देगा। यह अज्ञात है कि कौन-सा [[ग्रहीय मंडल]] इसका स्रोत है और यह कितने समय से तारों के बीच भ्रमण कर रहा है।<ref name="Nature 27-6-2018">{{cite journal |url=https://www.nature.com/articles/s41586-018-0254-4 |title=Non-gravitational acceleration in the trajectory of 1I/2017 U1 (ʻOumuamua) |author= Marco Micheli, Davide Farnocchia, Karen J. Meech, Marc W. Buie, Olivier R. Hainaut, Dina Prialnik, Norbert Schörghofer, Harold A. Weaver, Paul W. Chodas, Jan T. Kleyna, Robert Weryk, Richard J. Wainscoat, Harald Ebeling, Jacqueline V. Keane, Kenneth C. Chambers, Detlef Koschny & Anastassios E. Petropoulos |journal=Nature |year=2018}}</ref><ref name="NAT-20180627">{{cite journal |last=Witze |first=Alexandra |title=Mysterious interstellar visitor is a comet — not an asteroid - Quirks in ʻOumuamua's path through the Solar System helped researchers solve a case of mistaken identity |url=https://www.nature.com/articles/d41586-018-05552-9 |date=27 June 2018 |journal=[[Nature (journal)|Nature]] |doi=10.1038/d41586-018-05552-9 |accessdate=27 June 2018 }}</ref><ref name="NASA-20180627nasa">{{cite web |last1=Cofield |first1=Calla |last2=Chou |first2=Felicia |last3=Wendel |first3=JoAnna |last4=Weaver |first4=Donna |last5=Villard |first5=Ray |title=Our Solar System's First Known Interstellar Object Gets Unexpected Speed Boost |url=https://www.jpl.nasa.gov/news/news.php?feature=7173 |date=27 June 2018 |website=[[NASA]] |accessdate=27 June 2018 }}</ref>
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