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664 Judith (A908 MC)
Classification: Main-belt Asteroid          SPK-ID: 2000664
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2308453444672905 3.3799e-08  
a 3.19477513710227 1.483e-08 au
q 2.457276170082361 1.1212e-07 au
i 8.57963240990782 3.9617e-06 deg
node 170.9144461172916 2.5023e-05 deg
peri 102.3885802135892 2.5981e-05 deg
M 269.3490786550974 9.308e-06 deg
tp 2459525.704686204689
(2021-Nov-07.20468620)
5.5335e-05 TDB
period 2085.733760105019
5.71
1.4523e-05
3.976e-08
d
yr
n .1726011281429676 1.2018e-09 deg/d
Q 3.93227410412218 1.8254e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3076  
   data-arc span      40897 days (111.97 yr)  
   first obs. used      1908-06-24  
   last obs. used      2020-06-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45215  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:18:17  

Additional Information
 Earth MOID = 1.45922 au 
 Jupiter MOID = 1.35264 au 
 T_jup = 3.136 
[ 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 9.9   n/a MPO502159 IRAS observations used: 6
diameter diameter 85.214 km 0.588 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 13.764 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Behrend, R. (2010) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.040   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.695   0.017 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=6.72, mean=8.20, max.=10.35) deg.
U-B UB 0.238   0.045 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=6.73, mean=9.03, max.=10.35) deg.
Tholen spectral type spec_T XC   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices

664 Judith (A908 MC)          Discovered 1908-Jun-24 by Kopff, A. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A908 MC = 1951 AB1 = 1956 AH1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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