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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 ]

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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet 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. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet is not working, here are some notes that might help.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).

Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1534648467648973 3.8223e-08  
a 2.599438313557788 8.0985e-09 au
q 2.200515911092839 9.783e-08 au
i 1.041049988078644 3.5927e-06 deg
node 109.9762293275481 0.00023422 deg
peri 268.742555376527 0.00023453 deg
M 326.654111868156 1.3792e-05 deg
tp 2459142.293880684702
5.8959e-05 TDB
period 1530.797345827648
n .2351715600900527 1.099e-09 deg/d
Q 2.998360716022737 9.3413e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3006  
   data-arc span      40889 days (111.95 yr)  
   first obs. used      1907-09-08  
   last obs. used      2019-08-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45518  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-23 19:10:43  

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] (  
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.]
[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] (  
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

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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1994-Jul-03 06:21 00:01 Iris 0.0474780610639014 0.0474774793474665 0.0474786427897742 2.25829001070159 2.25828995708486 2449536.764861343 1.123970118586 51.9020012004531 18.3502543533424 -62.515247048878 348539.05205096 T 35 CATAB v2.0f-lin.ifort 2019-Sep-23 19:10:56 2019-Sep-23 19:10
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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