Skeleton Faced Asteroid to Pass Earth Again
 Radar epitome of 2015 TB145 taken by the Arecibo Observatory on 30 Oct 2015. | |
| Discovery[1] | |
|---|---|
| Discovered past | Pan-STARRS |
| Discovery date | 10 Oct 2015 |
| Designations | |
| MPC designation | 2015 TB145 |
| Pocket-size planet category |
|
| Orbital characteristics[2] | |
| Epoch 31 May 2022 (JD 2459000.v) | |
| Dubiousness parameter 0 | |
| Observation arc | three.11 yr (1,137 d) |
| Aphelion | 3.9073 AU |
| Perihelion | 0.2941 AU |
| Semi-major axis | 2.1007 AU |
| Eccentricity | 0.86002 |
| Orbital period (sidereal) | 3.04 year (1,112.one d) |
| Hateful anomaly | 121.744° |
| Hateful motion | 0° 19m 25.364s / day |
| Inclination | 39.6899° |
| Longitude of ascending node | 37.698° |
| Argument of perihelion | 121.744° |
| Globe MOID | 0.00295731 AU (442,407 km) |
| Jupiter MOID | 2.41052 AU |
| TJupiter | 2.97 |
| Physical characteristics | |
| Dimensions |
|
| Synodic rotation menstruation |
|
| Geometric albedo | 0.06[5] |
| Absolute magnitude(H) | 20.0[2] [half dozen] |
2015 TB145 is a sub-kilometer asteroid, classified every bit about-Earth object and potentially hazardous asteroid of the Apollo group, approximately 650 meters (2,000 feet) in diameter.[3] Information technology safely passed 1.27 lunar distances from World on 31 October 2022 at 17:01 UTC,[7] and passed by Earth again in November 2018.
Discovery [edit]
Discovery image of 2015 TB145 from the Pan-STARRS1 telescope, operated by the Constitute for Astronomy at the University of Hawaii.
The asteroid was starting time observed on ten Oct 2022 past Pan-STARRS at an apparent magnitude of 20 using a 1.8-meter (71 in) Ritchey–Chrétien telescope.[1] [6] [a] The asteroid was not discovered sooner because it spends almost of its time beyond the orbit of Mars, has a big orbital inclination, and is usually well below the plane of the ecliptic.[9] The asteroid concluding passed within 0.064 AU (ix,600,000 km; five,900,000 mi) of Earth on 29 October 1923 and volition non pass that shut again until 1 Nov 2088.[7]
The media has nicknamed the asteroid the "Cracking Pumpkin"[10] after the blithe Halloween television special It's the Great Pumpkin, Charlie Brown,[eleven] "Spooky",[12] the "Halloween Asteroid",[xiii] [fourteen] and the "Skull Asteroid"[11] due to its skull-like advent following radio frequency images taken at Arecibo Observatory and closest arroyo coincidentally occurring on Halloween day.[11]
2015 flyby [edit]
2015 TB145 passed 1.27 LD from the earth, and 0.75 LD from the moon.
On 31 Oct 2022 the asteroid passed 0.00191 AU (286,000 km; 178,000 mi) from the Moon and and so passed 0.00325 AU (486,000 km; 302,000 mi) from Earth.[7]
The last approach this close by an object with accented magnitude brighter than 20 was 2004 XP 14 on three July 2006 at 1.1 lunar distances. The next object this large known to pass this shut to Earth is (137108) 1999 AN 10 that will pass about 1 lunar altitude from World on 7 August 2027.[15] It is estimated that there are about 2400 about-Earth asteroids 300–500 meters in bore, of which about 1100 have been discovered.[xvi]
During closest approach to Earth the asteroid reached about apparent magnitude 10,[17] which is much too faint to exist seen by the naked center. Even at peak brightness, the asteroid was a challenging target for amateur astronomers with small-scale telescopes, best seen in the Northern hemisphere. The glare from an 80% waning gibbous Moon also hindered observations.[ citation needed ]
At eleven:00 UT the asteroid was in the constellation of Taurus about ix degrees from the Moon and moving at a rate of 3.4 degrees per hour.[17] At the fourth dimension of closest approach of 17:00 UT the asteroid was in the constellation of Ursa Major about 56 degrees from the Moon and moving at a rate of xiv.7 degrees per hour.[17] Later on closest approach it quickly became too faint and likewise close to the Sun in the sky to be seen.[fifteen]
2018 flyby [edit]
Afterward it had been unobservable for nearly three years, 2015 TB145 was recovered on seven Oct 2022 by L. Buzzi at Schiaparelli Observatory (observatory code 204), at credible magnitude 21.[19]
The 11 November 2022 flyby was virtually 0.267 AU (39,900,000 km; 24,800,000 mi) from Earth.[7] [20]
Observations [edit]
Radar imagery [edit]
The close approach was studied with radar using Goldstone, the Light-green Bank Telescope,[15] and the Arecibo Observatory. It was one of the best radar targets of the year with a resolution as high as two meters (seven ft) per pixel.[15] Bistatic radar images created with the Light-green Bank Telescope had a resolution of 4 meters (13 ft) per pixel.[21] Arecibo images had a resolution of 7.5 meters (25 ft) per pixel.[5]
| xxx October | 31 October 12:55–13:08 UTC | one November |
|---|---|---|
 |  | |
Possible cometary origin [edit]
The high orbital inclination and eccentricity propose 2015 TB145 may be an extinct comet that has shed its volatiles later on numerous passes effectually the Sun.[5] [22] Orbital calculations by Petrus Jenniskens and Jérémie Vaubaillon showed that information technology was not expected to produce associated meteors in 2015.[23] Any meteoroids were expected to pass more than 0.0007 AU (100,000 km; 65,000 mi) from Earth's orbit.[23]
If meteoroids related to this asteroid were to cross Earth's path, the radiant is expected to be nigh Northern Eridanus.[23] Cameras for Allsky Meteor Surveillance (CAMS) did not detect whatever activity in the presumed surface area of the sky during 2013 and 2014.[23] The object has a low albedo of 0.06, which is simply slightly more than a typical comet that has an albedo of 0.03-0.05.[5]
Notes [edit]
- ^ For comparison, effectually 6 October 2012, the asteroid peaked at about apparent magnitude 20.9, but had a solar elongation of only about 75 degrees while 0.4 AU from Earth.[eight]
References [edit]
- ^ a b "MPEC 2015-T86 : 2022 TB145". IAU Small Planet Middle. 13 Oct 2015. Retrieved 14 October 2015. (K15TE5B)
- ^ a b c d "JPL Pocket-sized-Body Database Browser: (2015 TB145)" (2018-eleven-20 last obs.). Jet Propulsion Laboratory. Retrieved 1 March 2020.
- ^ a b Müller, T. G.; Marciniak, A.; Butkiewicz-Bąk, M.; Duffard, R.; Oszkiewicz, D.; Käufl, H. U.; Szakáts, R.; Santana-Ros, T.; Kiss, C.; Santos-Sanz, P. (February 2017). "Big Halloween asteroid at lunar distance" (PDF). Astronomy & Astrophysics. 598: A63. arXiv:1610.08267. Bibcode:2017A&A...598A..63M. doi:10.1051/0004-6361/201629584. S2CID 119162848. Retrieved xiii October 2018.
- ^ "Asteroid Size Computer". CNEOS NASA/JPL. Retrieved 16 February 2018.
- ^ a b c d e f Halloween Skies to Include Expressionless Comet Flyby. NASA-JPL printing release. 30 Oct 2015
- ^ a b "2015 TB145 Orbit". IAU Minor Planet Center. Retrieved 24 Jan 2016.
- ^ a b c d "JPL Shut-Arroyo Information: (2015 TB145)" (final observation: 2015-10-27; arc: 17 days). Retrieved 22 October 2015.
- ^ "2015TB145 Ephemerides for October 2012". NEODyS (Near Earth Objects – Dynamic Site). Retrieved 24 October 2015.
- ^ Kelly Beatty (22 Oct 2015). "Shut-in Asteroid Offers Halloween Treat". Heaven & Telescope. Retrieved 26 October 2015.
- ^ Sarah Begley (xxx October 2015). "NASA Says 'Nifty Pumpkin' Asteroid Will Fly by on Halloween". Time Magazine.
- ^ a b c Nick Divito (31 Oct 2015). "Chilling 'skull asteroid' whizzes by Earth on Halloween". New York Post.
- ^ Andrew Fazekas (23 October 2015). "Asteroid Called 'Spooky' Volition Fizz Earth on Halloween". National Geographic Society.
- ^ Koren, Marina (31 October 2015). "A Halloween Comet". The Atlantic . Retrieved 1 January 2019.
- ^ ESA (28 Oct 2015). "Halloween Asteroid Gives us a Miss, Confirms ESA". European Space Bureau. Archived from the original on 4 May 2017. Retrieved 2 November 2015.
- ^ a b c d Dr. Lance A. Yard. Benner (24 October 2015). "Goldstone Radar Observations Planning: 2009 FD and 2022 TB145". NASA/JPL Asteroid Radar Research. Retrieved 24 October 2015.
- ^ "WISE Revises Numbers of Asteroids Most Globe". NASA/JPL. 29 September 2011. Retrieved 29 Oct 2015. (NASA Space Telescope Finds Fewer Asteroids Near Earth)
- ^ a b c "2015TB145 Ephemerides for 15 October 2022 through 31 Oct 2015". NEODyS (Near Globe Objects – Dynamic Site). Retrieved xiv Oct 2015.
- ^ a b Marchis, F.; et al. "Multiple asteroid systems: Dimensions and thermal backdrop from Spitzer Infinite Telescope and ground-based observations". Icarus. 221 (ii): 1130–1161. Bibcode:2012Icar..221.1130M. doi:x.1016/j.icarus.2012.09.013. Retrieved 24 Baronial 2018.
- ^ "MPEC 2018-T130: 2022 TB145". Minor Planet Centre. 10 October 2018. Retrieved 13 October 2018.
- ^ Williams, Matt (1 October 2018). "The "Death Comet" Will Laissez passer By World Just Later on Halloween". Universe Today. Retrieved xiii October 2018.
- ^ "PIA20043: Halloween Asteroid Rotation". NASA/JPL-Caltech/GSSR/NRAO/GB. 3 November 2015. Retrieved 4 November 2015.
- ^ Agle, D. C. (21 October 2015). "NASA Spots the 'Great Pumpkin': Halloween Asteroid a Care for for Radar Astronomers". NASA News . Retrieved 26 October 2015.
- ^ a b c d "Possible October 31 Meteors From Minor Planet 2022 TB_145". SETI Found. 26 Oct 2015. Archived from the original on 28 October 2015. Retrieved 26 October 2015. (CBET 4154)
External links [edit]
 | Wikimedia Commons has media related to 2015 TB145. |
- ALERT! Brilliant NEO 2022 TB145 on 29–31 October 2015 – Ian Musgrave (itelescope)
- WebCite archive of JPL solution #2 from xiv October 2015
- Halloween Asteroid is a Radar Scientific discipline Care for (NASA Jet Propulsion Laboratory on YouTube)
- Halloween Asteroid 2022 TB145 Flyby Jerry Hilburn, ten/31/2015 12:12-12:24AM, Catfish Observatory, Teirra Del Sol, Canon 5D and an Orion ED 80 Refractor on an AVX Celestron Mount
- 2015 TB145 at NeoDyS-two, About World Objects—Dynamic Site
- Ephemeris· Obs prediction· Orbital info· MOID· Proper elements· Obs info· Close· Physical info· NEOCC
- 2015 TB145 at ESA–space situational awareness
- Ephemerides· Observations· Orbit· Physical Properties· Summary
- 2015 TB145 at the JPL Pocket-sized-Torso Database
Source: https://en.wikipedia.org/wiki/2015_TB145
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