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JPL Small-Body Database Browser
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645 Agrippina (A907 RP)
Classification: Outer Main-belt Asteroid          SPK-ID: 2000645
[ 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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1415198228710656 3.5558e-08  
a 3.224484475123161 1.6306e-08 au
q 2.76815600335323 1.104e-07 au
i 7.027795305288167 4.9625e-06 deg
node 359.6930535721594 3.3865e-05 deg
peri 85.97809497957377 3.8572e-05 deg
M 200.4875824520021 1.819e-05 deg
tp 2459937.589040504472
(2022-Dec-24.08904050)		 0.00010878 TDB
period 2114.895252465843
5.79		 1.6042e-05
4.392e-08		 d
yr
n .1702211963359705 1.2912e-09 deg/d
Q 3.680812946893091 1.8614e-08 au
   Orbit Determination Parameters
   # obs. used (total)      3329  
   data-arc span      41119 days (112.58 yr)  
   first obs. used      1907-09-30  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .38472  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:09:37  

Additional Information
 Earth MOID = 1.79575 au 
 Jupiter MOID = 1.59683 au 
 T_jup = 3.161 
[ 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 9.8   n/a MPO492757 IRAS observations used: 17
diameter diameter 28.916 km 0.176 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 32.6 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:
[Binzel, R.P. (1987) Icarus 72, 135-208.]
geometric albedo albedo 0.213   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.871   0.019 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=3.86, mean=8.56, max.=14.61) deg.
U-B UB 0.412   0.074 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=4.41, mean=10.12, max.=14.61) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices

645 Agrippina (A907 RP)          Discovered 1907-Sep-13 by Metcalf, J. H. at Taunton
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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