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JPL Small-Body Database Browser
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871 Amneris (A917 JD)
Classification: Main-belt Asteroid          SPK-ID: 2000871
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1200358968738798 3.2496e-08  
a 2.222427669688029 5.3851e-09 au
q 1.9556565711197 7.303e-08 au
i 4.250835869286908 3.8581e-06 deg
node 158.0031814303792 4.2336e-05 deg
peri 66.61368976787463 4.5209e-05 deg
M 36.59811990971448 1.7299e-05 deg
tp 2458877.474212109044
(2020-Jan-28.97421211)
5.7977e-05 TDB
period 1210.151880752441
3.31
4.3984e-06
1.204e-08
d
yr
n .2974833206689407 1.0812e-09 deg/d
Q 2.489198768256359 6.0315e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2780  
   data-arc span      41149 days (112.66 yr)  
   first obs. used      1907-05-09  
   last obs. used      2020-01-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46559  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 17:43:18  

Additional Information
 Earth MOID = .951478 au 
 Jupiter MOID = 2.48952 au 
 T_jup = 3.635 
[ 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 12.6   n/a MPO358633  
diameter diameter 8.011 km 0.063 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 78.704 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Pilcher, F.; Benishek, V.; Oey, J. (2016) Minor Planet Bull. 43, 264-265.]
geometric albedo albedo 0.380   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

871 Amneris (A917 JD)          Discovered 1917-May-14 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A917 JD = 1930 DD = 1953 EZ = A907 JA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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