Misplaced Pages

2021 DW1

Article snapshot taken from Wikipedia with creative commons attribution-sharealike license. Give it a read and then ask your questions in the chat. We can research this topic together.
Asteroid

2021 DW1
Discovery 
Discovered byPan-STARRS 1
Discovery siteHaleakala Obs.
Discovery date16 February 2021
Designations
MPC designation2021 DW1
Alternative designationsP11dqY3 
Minor planet categoryNEO · Apollo 
Orbital characteristics 
Epoch 1 July 2020 (JD 2459396.5)
Uncertainty parameter 4
Observation arc27 days
Aphelion1.662 AU
Perihelion0.9918 AU
Semi-major axis1.327 AU
Eccentricity0.2525
Orbital period (sidereal)1.53 yr (558.29 days)
Mean anomaly71.096°
Mean motion0° 38 41.367 / day
Inclination6.878°
Longitude of ascending node162.489°
Argument of perihelion10.499°
Earth MOID0.00414 AU (619,000 km)
Physical characteristics
Mean diameter30±10 m 
Synodic rotation period0.013760±0.000001 h 
49.536±0.004 s
Axial tilt54°±10° or 123°±10°
(to orbit) 
Pole ecliptic latitude29°±10° or −40°±10° 
Pole ecliptic longitude57°±10° or 67°±10° 
Geometric albedo0.23±0.02 
Spectral typeSq 
g–i=0.79±0.01 
i–z=0.01±0.02
z–g=0.01±0.02 
Apparent magnitude21.0 (discovery) 
14.6 (max) 
Absolute magnitude (H)24.8±0.5  · 25.02±0.27 

2021 DW1 is a small Apollo near-Earth asteroid discovered on 16 February 2021 by the Pan-STARRS 1 survey at Haleakala Observatory, Hawaii. On 4 March 2021 at 8:59 UTC, it passed 1.48 LD (570,000 km; 350,000 mi) from Earth. During the close approach, it trailed across the Northern Hemisphere sky and brightened up to apparent magnitude of 14.6. Extensive observations of 2021 DW1 during the encounter revealed that it is an elongated, stony asteroid approximately 30 metres (100 ft) in diameter, with a rapid rotation period of 50 seconds. The asteroid's spin axis is unusually oblique relative to its orbital plane, contrary to predictions from the YORP effect.

References

  1. ^ "2021 DW1". Minor Planet Center. International Astronomical Union. Retrieved 11 October 2021.
  2. ^ "MPEC 2021-D73 : 2021 DW1". Minor Planet Electronic Circular. Minor Planet Center. 21 February 2021. Retrieved 11 October 2021.
  3. "2021 DW1". NEO Exchange. Las Cumbres Observatory. 29 September 2021. Retrieved 11 October 2021.
  4. ^ "JPL Small-Body Database Browser: (2021 DW1)" (2021-03-15 last obs.). Jet Propulsion Laboratory. Retrieved 11 October 2021.
  5. ^ Kwiatkowski, 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. S2CID 245019975.

External links

2021 in space
Space probe and
telescope launches Space probes launched in 2021

Impact events
Selected NEOs
Exoplanets Exoplanets discovered in 2021
Discoveries
Comets Comets in 2021
Space
exploration
Small Solar System bodies
Minor planets
Asteroid
Distant minor planet
Comets
Other
Portals:


Stub icon

This asteroid-related article is a stub. You can help Misplaced Pages by expanding it.

Categories: