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

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 54 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2553876972051422 4.9275e-08  
a 1.947579281497228 3.8391e-09 au
q 1.450191493671206 9.6365e-08 au
i 13.08612591369821 5.5793e-06 deg
node 213.3506333014715 1.777e-05 deg
peri 206.5615422612801 2.0104e-05 deg
M 325.8028921925646 1.1287e-05 deg
tp 2457694.803545781096
(2016-Nov-02.30354578)
3.1278e-05 JED
period 992.7528571235785
2.72
2.9354e-06
8.037e-09
d
yr
n .3626280170505589 1.0722e-09 deg/d
Q 2.444967069323251 4.8195e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1305  
   data-arc span      31297 days (85.69 yr)  
   first obs. used      1929-12-01  
   last obs. used      2015-08-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .47136  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Oct-28 15:52:39  

Additional Information
 Earth MOID = .470132 au 
 Jupiter MOID = 2.93913 au 
 T_jup = 3.824 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.51 mag n/a PDS3 (MPC 17261)  
rotation period rot_per 27.446 h n/a LCDB (Rev. 2016-February); 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 Bul. 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]
B-V BV .920 mag .020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=1; phase=7.94 deg.
U-B UB .497 mag .022 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #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 | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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