+ View the NASA Portal + Center for Near-Earth Object Studies 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 ] [ 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  [ 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. 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.DB Last 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 ] 2021-Jan-22 10:18 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin