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JPL Small-Body Database Browser
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863 Benkoela (A917 CG)
Classification: Outer Main-belt Asteroid          SPK-ID: 2000863
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0291579975129957 4.5977e-08  
a 3.20259243441069 1.7869e-08 au
q 3.109211252173004 1.4539e-07 au
i 25.41381853072728 4.7e-06 deg
node 116.9259465211336 1.1913e-05 deg
peri 96.95758311061319 8.466e-05 deg
M 223.7309069983322 8.5802e-05 deg
tp 2459392.902435031860
(2021-Jun-27.40243503)
0.00050112 TDB
period 2093.393816072278
5.73
1.752e-05
4.797e-08
d
yr
n .1719695535718399 1.4393e-09 deg/d
Q 3.295973616648375 1.839e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2184  
   data-arc span      37519 days (102.72 yr)  
   first obs. used      1917-02-09  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42124  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 01:58:32  

Additional Information
 Earth MOID = 2.15713 au 
 Jupiter MOID = 1.9082 au 
 T_jup = 3.041 
[ 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 9.02   n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 3
diameter diameter 38.724 km 0.161 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 8.20 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Garceran, A.C.; Aznar, A.; Mansego, E.A.; Rodriguez, P.B.; et al. (2016) Minor Planet Bull. 43, 92-97.]
geometric albedo albedo 0.290   0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 1.077   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=9.41, mean=12.67, max.=15.66) deg.
U-B UB 0.633   0.034 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=15.47, mean=15.57, max.=15.66) deg.
Tholen spectral type spec_T A   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B A   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)

863 Benkoela (A917 CG)          Discovered 1917-Feb-09 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A917 CG = 1927 WD 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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