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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 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1534648705483817 3.6524e-08  
a 2.599438314512985 6.389e-09 au
q 2.200515850077747 9.4451e-08 au
i 1.041047002612986 3.1765e-06 deg
node 109.9761596985909 0.00022801 deg
peri 268.7426344348509 0.00022824 deg
M 326.6541046403376 1.0275e-05 deg
tp 2459142.293911497094
(2020-Oct-19.79391150)
4.3751e-05 TDB
period 1530.797346671415
4.19
5.6437e-06
1.545e-08
d
yr
n .2351715599604275 8.6702e-10 deg/d
Q 2.998360778948224 7.3695e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3414  
   data-arc span      41321 days (113.13 yr)  
   first obs. used      1907-09-08  
   last obs. used      2020-10-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43008  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:27:18  

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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
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 40 CATAB v2.0f-lin.ifort 2020-Nov-13 04:27:27 2020-Nov-13 04:27
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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