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90890 (1997 AT12)
Classification: Main-belt Asteroid          SPK-ID: 2090890
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2204717322991043 3.9607e-08  
a 2.579435101633143 1.5537e-08 au
q 2.010742576422968 1.0665e-07 au
i 3.924823211981235 6.524e-06 deg
node 328.392756885208 7.4738e-05 deg
peri 107.2705510915176 7.856e-05 deg
M 261.3086409767993 2.6896e-05 deg
tp 2459415.322174601147
(2021-Jul-19.82217460)
0.00011586 TDB
period 1513.161682385047
4.14
1.3672e-05
3.743e-08
d
yr
n .2379124479497575 2.1496e-09 deg/d
Q 3.148127626843318 1.8963e-08 au
  Orbit Determination Parameters
   # obs. used (total)      834  
   data-arc span      16314 days (44.67 yr)  
   first obs. used      1975-12-02  
   last obs. used      2020-08-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51913  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 08:14:20  

Additional Information
 Earth MOID = 1.03011 au 
 Jupiter MOID = 2.13992 au 
 T_jup = 3.388 
[ 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 14.7   n/a MPO302515  
diameter diameter 6.885 km 0.127 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.051   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

90890 (1997 AT12)          Discovered 1997-Jan-10 by Kobayashi, T. at Oizumi
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1997 AT12 = 1975 XK3 = 2000 QV181 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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