| 词条 | C/2016 U1 (NEOWISE) |
| 释义 |
| name = C/2016 U1 (NEOWISE) | image = | caption = | discovery_site = NEOWISE | discoverer = NEOWISE project | discovery_date = Friday 21 October 2016[1] | epoch = 2457723.5 (2016-Dec-01.0) TDB[1] Reference: JPL 4 (heliocentric ecliptic J2000)[1] | obs_arc = | obs = | perihelion = 0.3191 AU[1] | semimajor = -3477.5728 AU[1] | eccentricity = 1.0001[1] | mean_anomaly = -0.0002 deg[1] | inclination = 46.4292 deg[1] | asc_node = 61.4214 deg[1] | arg_peri = 162.7640 deg[1] | mean_motion = 4.8061E-6 deg/d[1] | M1 = 13.7[1] | M2 = 20.0[1] | last_p = | next_p = }}C/2016 U1 (NEOWISE) is a hyperbolic comet discovered 21 October 2016 by NEOWISE, the asteroid-and-comet-hunting portion of the Wide-Field Infrared Survey Explorer (WISE) mission.[1][2][3] The comet may be visible to skywatchers on Earth, at an estimated +6th magnitude (naked eye brightness),[4] during the first week of 2017 and will be closest to the Sun on 14 January 2017.[2][5] The comet, closest to the Earth on 13 December 2016 at {{convert|106,000,000|km|mi|abbr=on}}[4] away, is not considered a threat to Earth.[2] References1. ^1 2 3 4 5 6 7 8 9 10 11 12 13 14 {{cite web |last1=Park |first1=Ryan S. |last2=Chamberlin |first2=Alan B. |title=JPL Small-Body Database Browser (C/2016 U1 (NEOWISE)) |url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=C/2016+U1;cad=1 |date=30 December 2016 |work=JPL |accessdate=30 December 2016 }} 2. ^1 2 {{cite web |last1=Agle |first1=DC |last2=Cantillo |first2=Laurie |last3=Brown |first3=Dwayne |title=NASA's NEOWISE Mission Spies One Comet, Maybe Two |url=http://www.jpl.nasa.gov/news/news.php?feature=6712 |date=29 December 2016 |work=NASA |accessdate=29 December 2016 }} 3. ^1 {{cite web |last=Dickinson |first=David |title=Comet U1 NEOWISE—a possible binocular comet? |url=http://phys.org/news/2016-12-comet-u1-neowisea-binocular.html |date=28 December 2016 |work=Phys.org |accessdate=30 December 2016 }} 4. ^1 {{cite news |last=MacDonald |first=Fiona |title=A rare comet is zooming past Earth right now, and you should be able to see it with binoculars |url=http://www.sciencealert.com/a-comet-is-zooming-past-earth-right-and-you-should-be-able-to-see-it-with-binoculars |date=31 December 2016 |work=ScienceAlert.com |accessdate=31 December 2016 }} 5. ^{{cite web |last=Williams |first=Matt |title=NASA’S NEOWISE Missions Spots New Comets |url=http://www.universetoday.com/132621/nasas-neowise-missions-spots-new-comets |date=30 December 2016 |work=Universe Today |accessdate=31 December 2016 }} External links
3 : Non-periodic comets|Comets in 2017|Astronomical objects discovered in 2016 |
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