(164121) 2003 YT1
 Mosaic of radar images of 2003 YT1 and its moon by Arecibo Observatory on 4 May 2004 | |
| Discovery[1] | |
|---|---|
| Discovered by | Catalina Sky Srvy. |
| Discovery site | Catalina Stn. |
| Discovery date | 18 December 2003 |
| Designations | |
| (164121) 2003 YT1 | |
| 2003 YT1 | |
| Apollo · NEO · PHA[1][2] | |
| Orbital characteristics[2] | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 35.41 yr (12,934 d) |
| Aphelion | 1.4335 AU |
| Perihelion | 0.7857 AU |
| 1.1096 AU | |
| Eccentricity | 0.2919 |
| 1.17 yr (427 d) | |
| 11.417° | |
| 0° 50m 35.88s / day | |
| Inclination | 44.064° |
| 38.335° | |
| 91.042° | |
| Known satellites | 1 (D: 210 m; P: 30 h)[3][4] |
| Earth MOID | 0.0027 AU (1.0519 LD) |
| Physical characteristics | |
| 1.0 km[3] 1.100±0.088 km[5] 1.561±0.202 km[6] 1.717±0.550 km[7] | |
| 2.34 h[8] 2.343 h[3] 2.343 h[9] 3.0025±0.0001 h[10] | |
| 0.198±0.153[7] 0.240±0.067[6] 0.36±0.20[11] 0.486±0.040[11] 0.4861±0.0395[5] 0.5848 (derived)[12] | |
| V[12][13][14] | |
| 16.2[2][5][12] 16.20±0.3[7] | |
(164121) 2003 YT1, provisional designation 2003 YT1, is a bright asteroid and synchronous binary system on a highly eccentric orbit, classified as near-Earth object and potentially hazardous asteroid of the Apollo group, approximately 2 kilometers (1.2 miles) in diameter. It was discovered on 18 December 2003, by astronomers with the Catalina Sky Survey at the Catalina Station near Tucson, Arizona, in the United States.[1] The V-type asteroid has a short rotation period of 2.3 hours.[12] Its 210-meter sized minor-planet moon was discovered at Arecibo Observatory in May 2004.[3][4]
Orbit and classification
[edit]2003 YT1 is a member of the Earth-crossing group of Apollo asteroids, the largest group of near-Earth objects with approximately 10 thousand known members.[1][2]
It orbits the Sun at a distance of 0.8–1.4 AU once every 1 years and 2 months (427 days; semi-major axis of 1.11 AU). Its orbit has an eccentricity of 0.29 and an inclination of 44° with respect to the ecliptic.[2] The body's observation arc begins with a precovery taken at the Siding Spring Observatory in November 1989, more than 14 years prior to its official discovery observation at Catalina.[1]
Close approaches and Torino rating
[edit]The asteroid has an Earth minimum orbital intersection distance of 0.0027 AU (404,000 km; 251,000 mi), which corresponds to 1.05 lunar distances and makes it a potentially hazardous asteroid due to its sufficiently large size.[2] On the Torino Scale, this object was rated level 1 on 27 December 2003 with an observation arc of 8.7 days.[15] It was removed from the risk table on 29 December 2003.[16] Over the next ten million years the asteroid has a 6% chance of impacting Earth.[17]
On 30 April 2004 it made a close approach at a nominal distance of 0.073 AU (28 LD), and on 31 October 2016, it passed Earth at 0.035 AU (14 LD). The asteroid's closest encounter with Earth will be on 29 April 2073, when it is projected to pass at 0.0113 AU (4.4 LD) only (see table).[2]
2003 YT1 has unique orbital characteristics among minor planets. It is the only known binary asteroid to have an Earth MOID within the Moon's Apogee.[18]
| Date | JPL Horizons nominal geocentric distance (AU) |
uncertainty region (3-sigma) |
|---|---|---|
| 2023-Nov-03 12:33 | 0.05936 AU (8.880 million km)[2] | ±18 km[19] |
| PHA | Date | Approach distance (lunar dist.) | Abs. mag (H) |
Diameter (C) (m) |
Ref (D) | ||
|---|---|---|---|---|---|---|---|
| Nomi- nal(B) |
Mini- mum |
Maxi- mum | |||||
| (33342) 1998 WT24 | 1908-12-16 | 3.542 | 3.537 | 3.547 | 17.9 | 556–1795 | data |
| (458732) 2011 MD5 | 1918-09-17 | 0.911 | 0.909 | 0.913 | 17.9 | 556–1795 | data |
| (7482) 1994 PC1 | 1933-01-17 | 2.927 | 2.927 | 2.928 | 16.8 | 749–1357 | data |
| 69230 Hermes | 1937-10-30 | 1.926 | 1.926 | 1.927 | 17.5 | 668–2158 | data |
| 69230 Hermes | 1942-04-26 | 1.651 | 1.651 | 1.651 | 17.5 | 668–2158 | data |
| (137108) 1999 AN10 | 1946-08-07 | 2.432 | 2.429 | 2.435 | 17.9 | 556–1795 | data |
| (33342) 1998 WT24 | 1956-12-16 | 3.523 | 3.523 | 3.523 | 17.9 | 556–1795 | data |
| (163243) 2002 FB3 | 1961-04-12 | 4.903 | 4.900 | 4.906 | 16.4 | 1669–1695 | data |
| (192642) 1999 RD32 | 1969-08-27 | 3.627 | 3.625 | 3.630 | 16.3 | 1161–3750 | data |
| (143651) 2003 QO104 | 1981-05-18 | 2.761 | 2.760 | 2.761 | 16.0 | 1333–4306 | data |
| 2017 CH1 | 1992-06-05 | 4.691 | 3.391 | 6.037 | 17.9 | 556–1795 | data |
| (170086) 2002 XR14 | 1995-06-24 | 4.259 | 4.259 | 4.260 | 18.0 | 531–1714 | data |
| (33342) 1998 WT24 | 2001-12-16 | 4.859 | 4.859 | 4.859 | 17.9 | 556–1795 | data |
| 4179 Toutatis | 2004-09-29 | 4.031 | 4.031 | 4.031 | 15.3 | 2440–2450 | data |
| 2014 JO25 | 2017-04-19 | 4.573 | 4.573 | 4.573 | 17.8 | 582–1879 | data |
| (137108) 1999 AN10 | 2027-08-07 | 1.014 | 1.010 | 1.019 | 17.9 | 556–1795 | data |
| (35396) 1997 XF11 | 2028-10-26 | 2.417 | 2.417 | 2.418 | 16.9 | 881–2845 | data |
| (154276) 2002 SY50 | 2071-10-30 | 3.415 | 3.412 | 3.418 | 17.6 | 714–1406 | data |
| (164121) 2003 YT1 | 2073-04-29 | 4.409 | 4.409 | 4.409 | 16.2 | 1167–2267 | data |
| (385343) 2002 LV | 2076-08-04 | 4.184 | 4.183 | 4.185 | 16.6 | 1011–3266 | data |
| (52768) 1998 OR2 | 2079-04-16 | 4.611 | 4.611 | 4.612 | 15.8 | 1462–4721 | data |
| (33342) 1998 WT24 | 2099-12-18 | 4.919 | 4.919 | 4.919 | 17.9 | 556–1795 | data |
| (85182) 1991 AQ | 2130-01-27 | 4.140 | 4.139 | 4.141 | 17.1 | 1100 | data |
| 314082 Dryope | 2186-07-16 | 3.709 | 2.996 | 4.786 | 17.5 | 668–2158 | data |
| (137126) 1999 CF9 | 2192-08-21 | 4.970 | 4.967 | 4.973 | 18.0 | 531–1714 | data |
| (290772) 2005 VC | 2198-05-05 | 1.951 | 1.791 | 2.134 | 17.6 | 638–2061 | data |
| (A) List includes near-Earth approaches of less than 5 lunar distances (LD) of objects with H brighter than 18. (B) Nominal geocentric distance from the Earth's center to the object's center (Earth radius≈0.017 LD). (C) Diameter: estimated, theoretical mean-diameter based on H and albedo range between X and Y. (D) Reference: data source from the JPL SBDB, with AU converted into LD (1 AU≈390 LD) (E) Color codes: unobserved at close approach observed during close approach upcoming approaches | |||||||
Meteor stream
[edit]On 28 April 2017, a 2.7 cm (1 in) fragment of 2013 YT1 is suspected of having impacted Earth creating a fireball over Kyoto, Japan.[17] The fragment would have broken off the parent body within the last ten thousand years.
Physical characteristics
[edit]
This object has been characterized as a bright Vestian-like V-type asteroid.[12][14][13]
Rotation period
[edit]Several rotational lightcurve of this asteroid have been obtained from photometric observations (U=2/n.a./3/3).[8][3][9][10] Analysis of the best-rated lightcurve gave a short rotation period of 2.343 hours with a brightness amplitude between 0.16 and 0.27 magnitude.[12]
Diameter and albedo
[edit]According to radar observations with the Arecibo Observatory and the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, this asteroid measures between 1.0 and 1.717 kilometers in diameter and its surface has an albedo between 0.198 and 0.4861.[3][5][6][7][11]
The Collaborative Asteroid Lightcurve Link derives an albedo of 0.5848 and adopts a diameter of 1.0 kilometer based on an absolute magnitude of 16.2.[12]
Satellite
[edit]The Arecibo radar observations in May 2004 revealed that 2003 YT1 is a synchronous binary asteroid.[3] Follow-up observations confirmed a 210-meter sized minor-planet moon orbiting its primary every 30 hours at a distance of 2.7 km.[4][9]
Numbering and naming
[edit]This minor planet was numbered by the Minor Planet Center on 26 September 2007 (M.P.C. 60686).[20] As of 2018, it has not been named.[1]
References
[edit]- ^ a b c d e f "164121 (2003 YT1)". Minor Planet Center. Retrieved 20 April 2018.
- ^ a b c d e f g h i "JPL Small-Body Database Browser: 164121 (2003 YT1)" (2018-04-18 last obs.). Jet Propulsion Laboratory. Retrieved 20 April 2018.
- ^ a b c d e f g Nolan, M. C.; Howell, E. S.; Hine, A. A. (May 2004). "2003 YT_1". IAU Circ. 8336 (8336): 3. Bibcode:2004IAUC.8336....3N.
- ^ a b c Johnston, Wm. Robert (20 September 2014). "Asteroids with Satellites Database – (164121) 2003 YT1". Johnston's Archive. Retrieved 20 April 2018.
- ^ a b c d Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. S2CID 118700974.
- ^ a b c Delbo, Marco; Walsh, Kevin; Mueller, Michael; Harris, Alan W.; Howell, Ellen S. (March 2011). "The cool surfaces of binary near-Earth asteroids" (PDF). Icarus. 212 (1): 138–148. Bibcode:2011Icar..212..138D. doi:10.1016/j.icarus.2010.12.011. S2CID 122586509.
- ^ a b c d Mainzer, A.; Grav, T.; Masiero, J.; Bauer, J.; Cutri, R. M.; McMillan, R. S.; et al. (November 2012). "Physical Parameters of Asteroids Estimated from the WISE 3-Band Data and NEOWISE Post-Cryogenic Survey". The Astrophysical Journal Letters. 760 (1): 6. arXiv:1210.0502. Bibcode:2012ApJ...760L..12M. doi:10.1088/2041-8205/760/1/L12. S2CID 41459166.
- ^ a b Larson, S. M.; Grauer, A. D.; Beshore, E.; Christensen, E.; Pravec, P.; Kaasalainen, M.; et al. (November 2004). "Physical Characteristics of the Binary PHA 2003 YT1". American Astronomical Society. 36: 1139. Bibcode:2004DPS....36.3207L.
- ^ a b c Pravec, P.; Scheirich, P.; Kusnirák, P.; Sarounová, L.; Mottola, S.; Hahn, G.; et al. (March 2006). "Photometric survey of binary near-Earth asteroids". Icarus. 181 (1): 63–93. Bibcode:2006Icar..181...63P. doi:10.1016/j.icarus.2005.10.014.
- ^ a b Behrend, Raoul. "Asteroids and comets rotation curves – (164121)". Geneva Observatory. Retrieved 21 April 2018.
- ^ a b c Mainzer, A.; Grav, T.; Bauer, J.; Masiero, J.; McMillan, R. S.; Cutri, R. M.; et al. (December 2011). "NEOWISE Observations of Near-Earth Objects: Preliminary Results". The Astrophysical Journal. 743 (2): 17. arXiv:1109.6400. Bibcode:2011ApJ...743..156M. doi:10.1088/0004-637X/743/2/156. S2CID 239991.
- ^ a b c d e f g "LCDB Data for (164121)". Asteroid Lightcurve Database (LCDB). Retrieved 20 April 2018.
- ^ a b Sanchez, Juan A.; Michelsen, René; Reddy, Vishnu; Nathues, Andreas (July 2013). "Surface composition and taxonomic classification of a group of near-Earth and Mars-crossing asteroids". Icarus. 225 (1): 131–140. arXiv:1302.4449. Bibcode:2013Icar..225..131S. doi:10.1016/j.icarus.2013.02.036. S2CID 119207812.
- ^ a b Thomas, Cristina A.; Emery, Joshua P.; Trilling, David E.; Delbó, Marco; Hora, Joseph L.; Mueller, Michael (January 2014). "Physical characterization of Warm Spitzer-observed near-Earth objects". Icarus. 228: 217–246. arXiv:1310.2000. Bibcode:2014Icar..228..217T. doi:10.1016/j.icarus.2013.10.004. S2CID 119278697.
- ^ "Major News about Minor Objects (2003 YT1)". hohmanntransfer. 27 December 2003. Retrieved 20 April 2018.
- ^ "NEOs Removed from Impact Risks Tables". Near Earth Object Program. NASA. Archived from the original on 2 June 2002. Retrieved 20 April 2018.
- ^ a b Kasuga, Toshihiro; Sato, Mikiya; Ueda, Masayoshi (2020). "A Fireball and Potentially Hazardous Binary Near-Earth Asteroid (164121) 2003 YT1". The Astronomical Journal. 159 (2): 47. arXiv:1910.06527. Bibcode:2020AJ....159...47K. doi:10.3847/1538-3881/ab4e1b. S2CID 204576074.
- ^ NASA.gov
- ^ "Horizons Batch for 2023-11-03 Close Approach". JPL Horizons. Archived from the original on 29 October 2022. Retrieved 29 October 2022. RNG_3sigma = uncertainty range in km. (JPL#162/Soln.date: 2022-Oct-10 generates RNG_3sigma = 18 km)
- ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 20 April 2018.
External links
[edit]- 2003 YT1, IAUC 8336, 6 May 2004
- List of the Potentially Hazardous Asteroids (PHAs), Minor Planet Center
- Asteroids with Satellites, Robert Johnston, johnstonsarchive.net
- PHA Close Approaches To The Earth, Minor Planet Center
- Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- (164121) 2003 YT1 at NeoDyS-2, Near Earth Objects—Dynamic Site
- (164121) 2003 YT1 at ESA–space situational awareness
- (164121) 2003 YT1 at the JPL Small-Body Database
