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JPL Small-Body Database Browser
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644 Cosima (A907 RG)
Classification: Main-belt Asteroid          SPK-ID: 2000644
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1534648777614051 3.7815e-08  
a 2.599438318071454 8.0266e-09 au
q 2.200515834340306 9.6884e-08 au
i 1.04105159616654 3.5809e-06 deg
node 109.9760336786571 0.00023271 deg
peri 268.7427647641396 0.00023302 deg
M 326.6540979807446 1.3779e-05 deg
tp 2459142.293940106275
(2020-Oct-19.79394011)
5.8902e-05 TDB
period 1530.797349814764
4.19
7.0902e-06
1.941e-08
d
yr
n .2351715594775247 1.0892e-09 deg/d
Q 2.998360801802602 9.2584e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3060  
   data-arc span      41141 days (112.64 yr)  
   first obs. used      1907-09-08  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44869  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:09:37  

Additional Information
 Earth MOID = 1.20287 au 
 Jupiter MOID = 2.46139 au 
 T_jup = 3.398 
[ 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 10.7   n/a MPO492757 IRAS observations used: 2
diameter diameter 17.016 km 0.196 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 7.556 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Alkema, M.S. (2013) Minor Planet Bull. 40, 133-137.]
[Aznar, A. (2013) Posting on CALL web site. http://www.MinorPlanet.info/call.html]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
geometric albedo albedo 0.271   0.049 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.816   0.037 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=5.75, mean=6.93, max.=7.73) deg.
U-B UB 0.413   0.064 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=7.31 deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices

644 Cosima (A907 RG)          Discovered 1907-Sep-07 by Kopff, A. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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