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1139 Atami (1929 XE)
Classification: Mars-crossing Asteroid          SPK-ID: 2001139
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 75 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2558216302563731 2.2303e-08  
a 1.947143793646884 3.0932e-09 au
q 1.449022294012559 4.2993e-08 au
i 13.08597361461829 8.6246e-07 deg
node 213.335170255896 3.9332e-06 deg
peri 206.6971544021852 4.7687e-06 deg
M 185.9077875367261 5.1707e-06 deg
tp 2459680.423822190479
(2022-Apr-10.92382219)
1.4913e-05 TDB
period 992.419899454263
2.72
2.3648e-06
6.474e-09
d
yr
n .3627496790400574 8.6438e-10 deg/d
Q 2.445265293281209 3.8845e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2626  
   data-arc span      33342 days (91.29 yr)  
   first obs. used      1929-12-01  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .3881  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 12:02:41  

Additional Information
 Earth MOID = .469852 au 
 Jupiter MOID = 2.93693 au 
 T_jup = 3.824 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.63   n/a E2021B10  
rotation period rot_per 27.446 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Koff, R.A. (2006) Minor Planet Bull. 33, 31-33.]
[Behrend, R. (2009) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2013) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2016) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
B-V BV 0.920   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=7.94 deg.
U-B UB 0.497   0.022 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=7.94 deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 4 color indices
SMASSII spectral type spec_B S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

1139 Atami (1929 XE)          Discovered 1929-Dec-01 by Oikawa, O. and Kubokawa, K. at Tokyo
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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