1139 Atami

1139 Atami
Discovery[1]
Discovered byO. Oikawa
K. Kubokawa
Discovery siteTokyo Astronomical Obs. (389)
Discovery date1 December 1929
Designations
(1139) Atami
PronunciationJapanese: [atami]
Named after
Atami (Japanese city)[2]
1929 XE
Mars-crosser[1][3][4]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc87.50 yr (31,960 days)
Aphelion2.4451 AU
Perihelion1.4505 AU
1.9478 AU
Eccentricity0.2553
2.72 yr (993 days)
110.80°
0° 21m 45.36s / day
Inclination13.087°
213.35°
206.62°
Known satellites1[5]
Earth MOID0.4722 AU · 184 LD
Mars MOID0.0298 AU
Physical characteristics
Dimensions8.24±0.82 km[6]
9.35 km (calculated)[4]
15 h[7]
20 h[8]
24 h[9]
27.43±0.05[9]
27.446±0.001 h[9]
27.45±0.01 h[9]
27.45±0.05 h[9]
27.472±0.002 h[9]
27.56±0.01 h[10][a]
0.20 (assumed)[4]
0.258±0.052[6]
S (Tholen)[1] · S (SMASS)[1][4]
S[11]
B–V = 0.920[1]
U–B = 0.497[1]
12.51[1][4][6] · 12.59±0.37[11] · 12.86±0.02[7]

1139 Atami, provisional designation 1929 XE, is a stony asteroid and sizable Mars-crosser, as well as a synchronous binary system[5] near the innermost region of the asteroid belt, approximately 9 kilometers in diameter. It was discovered on 1 December 1929, by Japanese astronomers Okuro Oikawa and Kazuo Kubokawa at the Tokyo Astronomical Observatory (389) near Tokyo.[3] It was named after the Japanese city of Atami.[2] It has the lowest Minimum orbit intersection distance (MOID) to Mars of any asteroid as large as it, its orbit intersecting only 0.03 astronomical units from the planet.

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  3. ^ a b Cite error: The named reference MPC-object was invoked but never defined (see the help page).
  4. ^ a b c d e Cite error: The named reference lcdb was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference CBET430 was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference Ali-Lagoa-2017 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Wisniewski-1997 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Lupishko-1988b was invoked but never defined (see the help page).
  9. ^ a b c d e f Cite error: The named reference geneva-obs was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Koff-2006a was invoked but never defined (see the help page).
  11. ^ a b Cite error: The named reference Veres-2015 was invoked but never defined (see the help page).


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