(9942) 1989 TM1

(9942) 1989 TM1
Discovery[1]
Discovered byT. Hioki
N. Kawasato
Discovery siteOkutama Obs.
Discovery date8 October 1989
Designations
(9942) 1989 TM1
1989 TM1
main-belt[1][2] · (middle)[3]
background
Orbital characteristics[2]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc26.64 yr (9,732 days)
Aphelion3.0287 AU
Perihelion2.1619 AU
2.5953 AU
Eccentricity0.1670
4.18 yr (1,527 days)
217.94°
0° 14m 8.52s / day
Inclination9.9393°
21.747°
38.492°
Physical characteristics
4.12±0.45 km[4]
4.73 km (calculated)[3]
3.0706±0.0004 h[5]
0.20 (assumed)[3]
0.454±0.106[4]
S (assumed)[3]
13.40[4] · 13.541[5]
13.6[2] · 13.99[3]

(9942) 1989 TM1 (provisional designation 1989 TM1) is a background asteroid from the central region of the asteroid belt, approximately 4.5 kilometers (2.8 miles) in diameter. It was discovered on 8 October 1989, by Japanese astronomers Nobuhiro Kawasato and Tsutomu Hioki at the Okutama Observatory (877) in Japan.[1] The asteroid has a tentative rotation period of 3.1 hours.[3]

  1. ^ a b c 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 jpldata was invoked but never defined (see the help page).
  3. ^ a b c d e f Cite error: The named reference lcdb was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference Masiero-2012 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Waszczak-2016 was invoked but never defined (see the help page).