+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   19965 (1987 RO1) Classification: Outer Main-belt Asteroid          SPK-ID: 2019965 [ 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 34 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1538267035904567 1.3041e-08   a 3.206506318222208 1.818e-08 au q 2.713260021248114 4.1729e-08 au i 3.947644087687496 2.3828e-07 deg node 132.0149107829133 1.0625e-05 deg peri 165.6045863219454 1.3862e-05 deg M 301.3397269834659 6.876e-06 deg tp 2459542.233973262808 (2021-Nov-23.73397326) 4.1187e-05 TDB period 2097.232488841897 5.74 1.7836e-05 4.883e-08 d yr n .1716547888302045 1.4598e-09 deg/d Q 3.699752615196302 2.0976e-08 au   Orbit Determination Parameters    # obs. used (total)      2111      data-arc span      12228 days (33.48 yr)      first obs. used      1987-09-14      last obs. used      2021-03-07      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .47915      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 03:10:22   Additional Information  Earth MOID = 1.69571 au   Jupiter MOID = 1.51987 au   T_jup = 3.170  [ 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 12.86   n/a E2021B10   diameter diameter 14.163 km 0.122 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.061   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   19965 (1987 RO1)          Discovered 1987-Sep-14 by Debehogne, H. at La Silla Reference: 20010109/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1987 RO1 = 1991 FV3 = 1999 TB40  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-19 01:29 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin