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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 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1534648703349389 3.6502e-08  
a 2.599438314379161 6.3135e-09 au
q 2.20051585051929 9.4419e-08 au
i 1.041046890309528 3.1346e-06 deg
node 109.9761595640269 0.00022799 deg
peri 268.742634375986 0.00022822 deg
M 326.6541049261867 1.0098e-05 deg
tp 2459142.293910270653
(2020-Oct-19.79391027)
4.2987e-05 TDB
period 1530.797346553202
4.19
5.577e-06
1.527e-08
d
yr
n .2351715599785881 8.5677e-10 deg/d
Q 2.99836077823903 7.2824e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3461  
   data-arc span      41336 days (113.17 yr)  
   first obs. used      1907-09-08  
   last obs. used      2020-11-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42789  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:55:07  

Additional Information
 Earth MOID = 1.20287 au 
 Jupiter MOID = 2.46139 au 
 T_jup = 3.398 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456189.5 (2012-Sep-19.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .155709793380113 3.6757e-08  
q 2.195225974977545 9.5501e-08 au
tp 2456083.106190545154
(2012-Jun-04.60619055)
4.2333e-05 TDB
node 109.9687935068127 0.00022843 deg
peri 269.2938127266383 0.00022864 deg
i 1.040748673501321 3.1302e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3461  
   data-arc span      41336 days (113.17 yr)  
   first obs. used      1907-09-08  
   last obs. used      2020-11-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42789  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:55:07  

Additional Information
 Jupiter MOID = 2.46139 au 
 T_jup = 3.398 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.351096432226501E-15 -3.504987507451178E-15 1.642719403883707E-14 3.568127132709719E-15 -8.493170368785489E-15 -2.659392935708669E-16
q -3.504987507451178E-15 9.12053531557908E-15 -9.025200887219208E-14 -8.788984166508788E-15 1.030125050449507E-14 6.887083788241119E-16
tp 1.642719403883707E-14 -9.025200887219208E-14 1.79207250779313E-9 -4.386796125850397E-12 4.438550649363329E-10 -1.204077833238766E-14
node 3.568127132709719E-15 -8.788984166508788E-15 -4.386796125850397E-12 5.217944022422903E-8 -5.217148182132414E-8 -4.630706678606989E-12
peri -8.493170368785489E-15 1.030125050449507E-14 4.438550649363329E-10 -5.217148182132414E-8 5.227799800071306E-8 4.628599005799462E-12
i -2.659392935708669E-16 6.887083788241119E-16 -1.204077833238766E-14 -4.630706678606989E-12 4.628599005799462E-12 9.798324247982387E-12

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. 2020-October); 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 41 CATAB v2.0f-lin.ifort 2020-Dec-18 01:55:17 2020-Dec-18 01:55
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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