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181 Eucharis (A878 CB)
Classification: Main-belt Asteroid          SPK-ID: 2000181
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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 80 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .207116049795032 1.4895e-08  
a 3.125700497356623 8.38e-09 au
q 2.478317757501752 4.7909e-08 au
i 18.8934025283804 3.6958e-07 deg
node 143.0181839142883 1.4055e-06 deg
peri 318.8869179674808 4.8854e-06 deg
M 352.633660707868 3.1109e-06 deg
tp 2459437.801772235205
(2021-Aug-11.30177224)
1.7476e-05 TDB
period 2018.456850141962
5.53
8.1172e-06
2.222e-08
d
yr
n .1783540728030329 7.1725e-10 deg/d
Q 3.773083237211493 1.0116e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3232  
   data-arc span      51431 days (140.81 yr)  
   first obs. used      1880-06-10  
   last obs. used      2021-04-03  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39157  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 14:22:57  

Additional Information
 Earth MOID = 1.52444 au 
 Jupiter MOID = 1.46178 au 
 T_jup = 3.099 
[ 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 7.91   n/a MPCxxxxx IRAS observations used: 12
diameter diameter 115.383 km 1.464 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 52.23 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Stephens, R.D. (2008) Minor Planet Bull. 35, 21-22.]
geometric albedo albedo 0.101   0.019 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.815   0.015 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=11.97, mean=15.58, max.=19.39) deg.
U-B UB 0.379   0.043 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=11.97, mean=15.58, max.=19.39) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 4 color indices
SMASSII spectral type spec_B Xk   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

181 Eucharis (A878 CB)          Discovered 1878-Feb-02 by Cottenot at Marseille
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A878 CB = A906 GA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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