+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   255 Oppavia (A886 FB) Classification: Main-belt Asteroid          SPK-ID: 2000255 [ 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 .07900951195369141 3.8264e-08   a 2.744953845826834 8.8339e-09 au q 2.528076382132648 1.047e-07 au i 9.464520571027256 4.3904e-06 deg node 13.59519412121248 2.0534e-05 deg peri 155.4392634432128 3.1258e-05 deg M 204.9679775463051 2.4592e-05 deg tp 2459715.852185830567 (2022-May-16.35218583) 0.00011438 TDB period 1661.119959754912 4.55 8.0188e-06 2.195e-08 d yr n .216721253565044 1.0462e-09 deg/d Q 2.96183130952102 9.5318e-09 au   Orbit Determination Parameters    # obs. used (total)      3034      data-arc span      49172 days (134.63 yr)      first obs. used      1886-04-01      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .42215      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 01:52:11   Additional Information  Earth MOID = 1.53615 au   Jupiter MOID = 2.0036 au   T_jup = 3.324  [ 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 10.3   n/a MPO502155 IRAS observations used: 12 diameter diameter 56.939 km 0.474 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 19.499 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Ditteon, R.; Kirkpatrick, E.; Doering, K. (2010) Minor Planet Bull. 37, 1-4.] [Pilcher, F. (2013) Minor Planet Bull. 40, 158-160.] geometric albedo albedo 0.038   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   B-V BV 0.764   0.018 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=1.51, mean=7.91, max.=14.32) deg. U-B UB 0.275   0.056 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=2.18, mean=8.25, max.=14.32) deg. Tholen spectral type spec_T X   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices 255 Oppavia (A886 FB)          Discovered 1886-Mar-31 by Palisa, J. at Vienna Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  A886 FB = 1938 VC = 1938 XC = 1945 GD = 1951 SG = A904 EC = A924 TA  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-17 10:14 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin