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172 Baucis (A877 CA)
Classification: Main-belt Asteroid          SPK-ID: 2000172
[ 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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 76 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1143240244555513 4.183e-08  
a 2.379692414849056 5.3906e-09 au
q 2.107636401017163 9.9253e-08 au
i 10.02031834911751 4.6569e-06 deg
node 331.916771166986 2.2511e-05 deg
peri 359.7120373291344 2.8645e-05 deg
M 190.7777097141183 1.8571e-05 deg
tp 2459630.781752861438
(2022-Feb-20.28175286)		 6.9654e-05 TDB
period 1340.848363692476
3.67		 4.5561e-06
1.247e-08		 d
yr
n .2684867355236345 9.1229e-10 deg/d
Q 2.651748428680949 6.0069e-09 au
   Orbit Determination Parameters
   # obs. used (total)      2503  
   data-arc span      50341 days (137.83 yr)  
   first obs. used      1882-09-01  
   last obs. used      2020-06-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44579  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:32:37  

Additional Information
 Earth MOID = 1.09701 au 
 Jupiter MOID = 2.68492 au 
 T_jup = 3.510 
[ 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 8.7   n/a MPO502154 IRAS observations used: 21
diameter diameter 62.43 km 1.2 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 21
rotation period rot_per 27.417 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Bembrick, C.S.; Richards, T.; Bolt, G.; Pereghy, B.; et al. (2004) Minor Planet Bull. 31, 51-52.]
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Marciniak, A.; Pilcher, F.; Oszkiewicz, D.; Santana-Ros, T.; et al. (2015) Planet. Space Sci. 118, 256-266.]
[Devogele, M.; Tanga, P.; Bendjoya, P.; Rivet, J.P.; et al. (2017) ArXiv:1707.07503.]
geometric albedo albedo 0.1382   0.006 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 21
B-V BV 0.890   0.019 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=3.73, mean=8.30, max.=16.81) deg.
U-B UB 0.499   0.040 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=3.73, mean=8.30, max.=16.81) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B L   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)

172 Baucis (A877 CA)          Discovered 1877-Feb-05 by Borrelly, A. at Marseille
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A877 CA = A921 EE 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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