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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 47 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2308198807435496 1.0693e-08  
a 3.193940240225436 1.158e-08 au
q 2.456715334874577 3.7536e-08 au
i 8.580757058716619 7.4651e-07 deg
node 170.9143356091488 1.6561e-06 deg
peri 102.4502733735332 4.5739e-06 deg
M 303.8112199156822 3.3074e-06 deg
tp 2459525.913606741191
(2021-Nov-07.41360674)
1.9334e-05 TDB
period 2084.916210158564
5.71
1.1339e-05
3.104e-08
d
yr
n .1726688095406102 9.3907e-10 deg/d
Q 3.931165145576295 1.4253e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3336  
   data-arc span      41180 days (112.74 yr)  
   first obs. used      1908-06-24  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44304  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 18:43:20  

Additional Information
 Earth MOID = 1.45687 au 
 Jupiter MOID = 1.3531 au 
 T_jup = 3.137 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456588.5 (2013-Oct-23.0) TDB
Reference: JPL 47 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2282521774362204 1.0421e-08  
q 2.47330422525651 3.6817e-08 au
tp 2457435.784149634647
(2016-Feb-17.28414963)
2.166e-05 TDB
node 171.1056917188871 1.6498e-06 deg
peri 101.264021586076 4.7098e-06 deg
i 8.549930296850986 7.4447e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3336  
   data-arc span      41180 days (112.74 yr)  
   first obs. used      1908-06-24  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44304  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 18:43:20  

Additional Information
 Jupiter MOID = 1.3531 au 
 T_jup = 3.137 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.086044817858449E-16 -3.727827478142108E-16 1.355866356583949E-13 2.370669305073399E-15 3.555337216546595E-14 -4.011732572806124E-16
q -3.727827478142108E-16 1.355519764120761E-15 -5.188638230490129E-13 -1.020693445303115E-14 -1.340866007034312E-13 1.594223020834334E-15
tp 1.355866356583949E-13 -5.188638230490129E-13 4.691515266811309E-10 1.613433800623801E-11 9.568106453485473E-11 5.11170688638398E-13
node 2.370669305073399E-15 -1.020693445303115E-14 1.613433800623801E-11 2.721756711920529E-12 1.336375167415128E-12 -1.687435777853326E-13
peri 3.555337216546595E-14 -1.340866007034312E-13 9.568106453485473E-11 1.336375167415128E-12 2.218195056697073E-11 2.510238505483145E-13
i -4.011732572806124E-16 1.594223020834334E-15 5.11170688638398E-13 -1.687435777853326E-13 2.510238505483145E-13 5.542291715281895E-13

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 9.97   n/a E2021B10 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. 2020-October); 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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