+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   21898 (1999 VJ7) Classification: Main-belt Asteroid          SPK-ID: 2021898 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 29 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .142861177428322 3.3838e-08   a 3.131263163849513 1.886e-08 au q 2.683927221424039 1.0925e-07 au i 9.220887212136995 3.8766e-06 deg node 48.29721309317051 2.3906e-05 deg peri 13.02245009656183 2.9503e-05 deg M 316.086481195749 2.0754e-05 deg tp 2459643.372956583811 (2022-Mar-04.87295658) 0.00011807 TDB period 2023.847480005825 5.54 1.8284e-05 5.006e-08 d yr n .1778790168510939 1.607e-09 deg/d Q 3.578599106274987 2.1554e-08 au   Orbit Determination Parameters    # obs. used (total)      1590      data-arc span      11664 days (31.93 yr)      first obs. used      1988-11-02      last obs. used      2020-10-09      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .49675      source      ORB      producer      Otto Matic      solution date      2021-Jul-09 10:14:36   Additional Information  Earth MOID = 1.69707 au   Jupiter MOID = 1.79144 au   T_jup = 3.177  [ 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 13.2   n/a MPO358837   diameter diameter 12.909 km 0.023 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.031   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   21898 (1999 VJ7)          Discovered 1999-Nov-07 by Korlevic, K. at Visnjan Reference: 20010208/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1999 VJ7 = 1988 VY5  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Aug-01 05:42 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin