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JPL Small-Body Database Browser
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20958 (A900 MA)
Classification: Mars-crossing Asteroid          SPK-ID: 2020958
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2954346361492758 3.1792e-08  
a 2.329643905060813 7.5931e-09 au
q 1.641386405611793 7.3707e-08 au
i 8.162289174210732 3.9478e-06 deg
node 97.46930473465827 3.368e-05 deg
peri 187.7775005671265 3.4728e-05 deg
M 141.9521947386375 1.0933e-05 deg
tp 2458088.379275175695
(2017-Nov-30.87927518)		 3.8212e-05 TDB
period 1298.771472157932
3.56		 6.3497e-06
1.738e-08		 d
yr
n .2771850227059989 1.3552e-09 deg/d
Q 3.017901404509832 9.8363e-09 au
   Orbit Determination Parameters
   # obs. used (total)      1576  
   data-arc span      43320 days (118.60 yr)  
   first obs. used      1900-06-29  
   last obs. used      2019-02-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50384  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 23:47:47  

Additional Information
 Earth MOID = .624764 au 
 Jupiter MOID = 2.15854 au 
 T_jup = 3.499 
[ show covariance matrix ]

[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.4   n/a MPO358830  
diameter diameter 2.847 km 0.425 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
geometric albedo albedo 0.399   0.183 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  

20958 (A900 MA)          Discovered 1900-Jun-29 by Keeler, J. E. at Mt. Hamilton
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 A900 MA = 1999 CC53 = 2000 TO50 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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