2021 DW1

2021 DW1
Discovery [1][2]
Discovered byPan-STARRS 1
Discovery siteHaleakala Obs.
Discovery date16 February 2021
Designations
2021 DW1
P11dqY3 [3]
NEO · Apollo [4]
Orbital characteristics [4]
Epoch 1 July 2020 (JD 2459396.5)
Uncertainty parameter 4
Observation arc27 days
Aphelion1.662 AU
Perihelion0.9918 AU
1.327 AU
Eccentricity0.2525
1.53 yr (558.29 days)
71.096°
0° 38m 41.367s / day
Inclination6.878°
162.489°
10.499°
Earth MOID0.00414 AU (619,000 km)
Physical characteristics
30±10 m [5]
0.013760±0.000001 h [5]
49.536±0.004 s
54°±10° or 123°±10°
(to orbit) [5]
29°±10° or −40°±10° [5]
57°±10° or 67°±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 DW1 is a small Apollo near-Earth asteroid discovered on 16 February 2021 by the Pan-STARRS 1 survey at Haleakala Observatory, Hawaii.[2] 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.[5]

  1. ^ a b Cite error: The named reference MPC-object was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference MPEC-2021-D73 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference NEO-Exchange was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference jpldata was invoked but never defined (see the help page).
  5. ^ a b c d e f g h i j k l Cite error: The named reference Kwiatkowski2021 was invoked but never defined (see the help page).