2021 DW1
| Discovery [1][2] | |
|---|---|
| Discovered by | Pan-STARRS 1 |
| Discovery site | Haleakala Obs. |
| Discovery date | 16 February 2021 |
| Designations | |
| 2021 DW1 | |
| P11dqY3 [3] | |
| NEO·Apollo [4] | |
| Orbital characteristics [4] | |
| Epoch1 July 2020 (JD2459396.5) | |
| Uncertainty parameter4 | |
| Observation arc | 27 days |
| Aphelion | 1.662AU |
| Perihelion | 0.9918 AU |
| 1.327 AU | |
| Eccentricity | 0.2525 |
| 1.53 yr (558.29 days) | |
| 71.096° | |
| 0° 38m41.367s/ day | |
| Inclination | 6.878° |
| 162.489° | |
| 10.499° | |
| EarthMOID | 0.00414 AU (619,000 km) |
| Physical characteristics | |
| 30±10m [5] | |
| 0.013760±0.000001h [5] 49.536±0.004s | |
| 54°±10°or123°±10° (to orbit) [5] | |
| 29°±10°or−40°±10° [5] | |
| 57°±10°or67°±10° [5] | |
| 0.23±0.02 [5] | |
| Sq [5] g–i=0.79±0.01 [5] i–z=0.01±0.02 z–g=0.01±0.02 [5] | |
| 21.0 (discovery) [2] 14.6 (max) [5] | |
| 24.8±0.5 [5]·25.02±0.27 [4][1] | |
2021 DW1is a smallApollonear-Earth asteroiddiscovered on 16 February 2021 by thePan-STARRS 1survey atHaleakala Observatory,Hawaii.[2]On 4 March 2021 at 8:59UTC,it passed 1.48LD(570,000km;350,000mi) from Earth. During the close approach, it trailed across theNorthern Hemisphere skyand brightened up toapparent magnitudeof 14.6. Extensive observations of2021 DW1during the encounter revealed that it is an elongated,stonyasteroid approximately 30 metres (100 ft) in diameter, with a rapid rotation period of 50 seconds. The asteroid's spin axis is unusuallyobliquerelative to itsorbital plane,contrary to predictions from theYORP effect.[5]
References
[edit]- ^ab"2021 DW1".Minor Planet Center.International Astronomical Union.Retrieved11 October2021.
- ^abc"MPEC 2021-D73: 2021 DW1".Minor Planet Electronic Circular.Minor Planet Center.21 February 2021.Retrieved11 October2021.
- ^"2021 DW1".NEO Exchange.Las Cumbres Observatory.29 September 2021.Retrieved11 October2021.
- ^abc"JPL Small-Body Database Browser: (2021 DW1)"(2021-03-15 last obs.).Jet Propulsion Laboratory.Retrieved11 October2021.
- ^abcdefghijklKwiatkowski, T.; Koleńczuk, P.; Kryszczyńska, A.; Oszkiewicz, D.; Kamiński, K.; Kamińska, M. K.; et al. (23 September 2021). "Photometry and model of near-Earth asteroid 2021 DW1 from one apparition".Astronomy & Astrophysics.656:A126.arXiv:2109.11689.Bibcode:2021A&A...656A.126K.doi:10.1051/0004-6361/202142013.S2CID245019975.
External links
[edit]- Near-Earth asteroid 2021 DW1 very close encounter: an image – 03 Mar. 2021,Gianluca Masi,Virtual Telescope Project, 4 March 2021
- 2021 DW1atNeoDyS-2, Near Earth Objects—Dynamic Site
- 2021 DW1atESA–space situational awareness
- 2021 DW1at theJPL Small-Body Database
 | Thisasteroid-related article is astub.You can help Wikipedia byexpanding it. |