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878 Mildred (A916 RC)
Classification: Main-belt Asteroid          SPK-ID: 2000878
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2267667898395894 4.1618e-08  
a 2.359956477912171 7.1788e-09 au
q 1.824796723254884 9.6641e-08 au
i 2.06567026591646 3.7432e-06 deg
node 172.8368447390641 9.7815e-05 deg
peri 190.1949314365697 9.8129e-05 deg
M 219.2721455868419 1.0355e-05 deg
tp 2459518.144951956266
(2021-Oct-30.64495196)
3.9705e-05 TDB
period 1324.202543137982
3.63
6.0422e-06
1.654e-08
d
yr
n .2718617343438284 1.2405e-09 deg/d
Q 2.895116232569458 8.8068e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1826  
   data-arc span      37885 days (103.72 yr)  
   first obs. used      1916-09-07  
   last obs. used      2020-05-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51588  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:21:59  

Additional Information
 Earth MOID = .822394 au 
 Jupiter MOID = 2.56257 au 
 T_jup = 3.516 
[ 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 14.7   n/a MPO337250  
diameter diameter 2.529 km 0.381 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 2.660 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Stephens, R.D.; French, L.M. (2011) Minor Planet Bull. 38, 1-2.]
geometric albedo albedo 0.399   0.218 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

878 Mildred (A916 RC)          Discovered 1916-Sep-06 by Nicholson, S. B. at Mount Wilson
and H. Shapley
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A916 RC = 1985 VG6 = 1991 GZ8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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