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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1401412041500832 3.4134e-08  
a 3.225104377876697 1.7369e-08 au
q 2.773134366851352 1.0582e-07 au
i 7.046857902017315 4.3061e-06 deg
node 359.3554643915419 3.3338e-05 deg
peri 86.89367531007008 3.7168e-05 deg
M 233.7027949976666 1.7302e-05 deg
tp 2459942.673302566528
(2022-Dec-29.17330257)		 0.00010361 TDB
period 2115.505160379547
5.79		 1.709e-05
4.679e-08		 d
yr
n .1701721209393843 1.3747e-09 deg/d
Q 3.677074388902043 1.9803e-08 au
   Orbit Determination Parameters
   # obs. used (total)      3604  
   data-arc span      41331 days (113.16 yr)  
   first obs. used      1907-09-30  
   last obs. used      2020-11-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .37167  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 11:13:26  

Additional Information
 Earth MOID = 1.80053 au 
 Jupiter MOID = 1.59559 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 9.94   n/a E2021B10 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. 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:
[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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