+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   2637 Bobrovnikoff (A919 SB) Classification: Main-belt Asteroid          SPK-ID: 2002637 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 37 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2352386537815746 1.7538e-08   a 2.255206514964823 6.2556e-09 au q 1.724694770385061 4.0124e-08 au i 4.932035303855074 5.5307e-07 deg node 356.1010640300801 5.0834e-06 deg peri 343.538061549469 5.3868e-06 deg M 333.2247778369938 4.8824e-06 deg tp 2459292.504376246083 (2021-Mar-19.00437625) 1.7023e-05 TDB period 1237.023366116159 3.39 5.147e-06 1.409e-08 d yr n .2910211802468047 1.2109e-09 deg/d Q 2.785718259544584 7.7272e-09 au   Orbit Determination Parameters    # obs. used (total)      2791      data-arc span      36876 days (100.96 yr)      first obs. used      1919-09-22      last obs. used      2020-09-07      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .45342      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 14:03:17   Additional Information  Earth MOID = .715033 au   Jupiter MOID = 2.61357 au   T_jup = 3.582  [ 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 13.12   n/a E2021B10   diameter diameter 6.215 km 0.105 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   rotation period rot_per 4.7939 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] geometric albedo albedo 0.316   0.061 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   2637 Bobrovnikoff (A919 SB)          Discovered 1919-Sep-22 by Reinmuth, K. at Heidelberg Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  A919 SB = 1953 TL = 1963 RB = 1976 JB7 = 1980 TN3  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jun-13 22:16 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin