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JPL Small-Body Database Browser
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12207 (1981 EU28)
Classification: Main-belt Asteroid          SPK-ID: 2012207
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1937793931265026 3.839e-08  
a 2.227038479377137 6.8168e-09 au
q 1.795484314374066 8.7649e-08 au
i 4.109705266169106 4.0455e-06 deg
node 296.6668845693846 4.7165e-05 deg
peri 19.72357442037738 4.7972e-05 deg
M 42.18514861329752 8.8595e-06 deg
tp 2458458.251698008931
(2018-Dec-05.75169801)		 2.9662e-05 TDB
period 1213.919836722886
3.32		 5.5736e-06
1.526e-08		 d
yr
n .2965599449893337 1.3616e-09 deg/d
Q 2.658592644380208 8.1378e-09 au
   Orbit Determination Parameters
   # obs. used (total)      1745  
   data-arc span      16211 days (44.38 yr)  
   first obs. used      1975-07-11  
   last obs. used      2019-11-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5116  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 22:43:26  

Additional Information
 Earth MOID = .781624 au 
 Jupiter MOID = 2.62606 au 
 T_jup = 3.617 
[ 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 14.3   n/a MPO347621  
diameter diameter 3.680 km 0.216 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 4.836 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Salvaggio, F.; Marchini, A.; Papini, R. (2016) Minor Planet Bull. 43, 9.]
geometric albedo albedo 0.299   0.033 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

12207 (1981 EU28)          Discovered 1981-Mar-01 by Bus, S. J. at Siding Spring
Reference: 19991123/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1981 EU28 = 1975 NM = 1998 KQ14 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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