Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.

JPL Small-Body Database Browser
Search: [ help ]  
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 ]

[ hide orbit diagram ]

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.

[ revert to old Java-based viewer ]

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
5.8609e-05 TDB
period 1532.031981826265
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 
[ 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-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.]
[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

[ hide close-approach data ]
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 ]
FirstGov 2020-Jan-25 02:52 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin