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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1197829063926915 3.2544e-08  
a 2.22198842127341 5.5181e-09 au
q 1.955832190202373 7.3166e-08 au
i 4.250654790732585 3.873e-06 deg
node 158.0136510639877 4.2498e-05 deg
peri 66.50606873121241 4.5401e-05 deg
M 277.6573756529824 1.725e-05 deg
tp 2458877.215392445175
(2020-Jan-28.71539245)
5.8369e-05 TDB
period 1209.793130474486
3.31
4.5066e-06
1.234e-08
d
yr
n .2975715359359054 1.1085e-09 deg/d
Q 2.488144652344448 6.179e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2759  
   data-arc span      40911 days (112.01 yr)  
   first obs. used      1907-05-09  
   last obs. used      2019-05-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45701  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 19:15:25  

Additional Information
 Earth MOID = .95174 au 
 Jupiter MOID = 2.49119 au 
 T_jup = 3.636 
[ 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-January); 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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