4197 Morpheus

4197 Morpheus
Discovery [1]
Discovered byE. F. Helin
E. Shoemaker
Discovery sitePalomar Obs.
Discovery date11 October 1982
Designations
(4197) Morpheus
Pronunciation/ˈmɔːrfiːəs/[2]
Named after
Morpheus
(mythology and movie)[3]
1982 TA
Apollo · NEO
Mars-crosser
Venus-crosser
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc61.98 yr (22,639 days)
Earliest precovery date3 September 1954
Aphelion4.0690 AU
Perihelion0.5246 AU
2.2968 AU
Eccentricity0.7716
3.48 yr (1,271 days)
339.88°
0° 16m 59.16s / day
Inclination12.577°
7.1844°
122.40°
Earth MOID0.0987 AU · 38.5 LD
Physical characteristics
1.8 km (dated)[1]
2.20 km (dated)[4]
2.98 km (taken)[5]
2.981 km[6]
3.043±0.156 km[7]
3.5372 h[8]
3.5380 h[9]
3.5387 h[10]
3.540±0.001 h[11]
3.560 h[12]
0.2389[5][6]
0.276±0.077[7]
0.44[4]
SMASS = Sq [1] · S [5]
14.6[1][7] · 14.8[4][5][6][11] · 14.88[9]

4197 Morpheus, provisional designation 1982 TA, is a highly eccentric asteroid and near-Earth object of the Apollo group, approximately 3 kilometers in diameter. It was discovered on 11 October 1982, by American astronomers Eleanor Helin and Eugene Shoemaker at Palomar Observatory in California, United States. The asteroid was later named for Morpheus from Greek mythology.[3]

  1. ^ a b c d e Cite error: The named reference jpldata was invoked but never defined (see the help page).
  2. ^ "Morpheus". Lexico UK English Dictionary. Oxford University Press. Archived from the original on 20 March 2020.
  3. ^ a b Cite error: The named reference MPC-Morpheus was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference Harris-1998a was invoked but never defined (see the help page).
  5. ^ a b c d Cite error: The named reference lcdb was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference Pravec-2012b was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference WISE was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Prokofeva-2001 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Pravec-2000a was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Galad-2004 was invoked but never defined (see the help page).
  11. ^ a b Cite error: The named reference Wisniewski-1997 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Hoffmann-1993a was invoked but never defined (see the help page).