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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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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.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1544842508848725 3.8334e-08  
a 2.600835811349021 7.7525e-09 au
q 2.199047639358218 9.8479e-08 au
i 1.040839779925466 3.5907e-06 deg
node 109.9777536013681 0.0002344 deg
peri 268.5506109604362 0.0002347 deg
M 232.9324775677615 1.35e-05 deg
tp 2459141.254189493377
(2020-Oct-18.75418949)
5.8609e-05 TDB
period 1532.031981826265
4.19
6.8499e-06
1.875e-08
d
yr
n .2349820397162078 1.0506e-09 deg/d
Q 3.002623983339824 8.9501e-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 = 1.20056 au 
 Jupiter MOID = 2.45445 au 
 T_jup = 3.397 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455720.5 (2011-Jun-08.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1551057196264578 3.8614e-08  
q 2.195655320479101 9.9094e-08 au
tp 2456083.060269124197
(2012-Jun-04.56026912)
5.289e-05 TDB
node 109.9673387113198 0.00023472 deg
peri 269.2725336816831 0.00023501 deg
i 1.040733286624662 3.5882e-06 deg
  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
 Jupiter MOID = 2.45445 au 
 T_jup = 3.397 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.491031844453823E-15 -3.818261398948812E-15 3.170710256493595E-13 4.263768041523133E-16 4.879937350765336E-14 -2.98472174436361E-17
q -3.818261398948812E-15 9.819692037158321E-15 -7.443568688575113E-13 -1.034161823108764E-15 -1.143630384102535E-13 6.757916086001465E-17
tp 3.170710256493595E-13 -7.443568688575113E-13 2.79739343762201E-9 -8.66147074449701E-12 6.415022325150555E-10 -5.5209286767525E-14
node 4.263768041523133E-16 -1.034161823108764E-15 -8.66147074449701E-12 5.509145946385516E-8 -5.508382390761413E-8 -5.131293388784055E-11
peri 4.879937350765336E-14 -1.143630384102535E-13 6.415022325150555E-10 -5.508382390761413E-8 5.522816909365353E-8 5.129156665788448E-11
i -2.98472174436361E-17 6.757916086001465E-17 -5.5209286767525E-14 -5.131293388784055E-11 5.129156665788448E-11 1.287487392901438E-11

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-January); 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

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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