+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1529 Oterma (1938 BC) Classification: Outer Main-belt Asteroid          SPK-ID: 2001529 [ 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 31 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2007025338437526 4.1285e-08   a 3.988009173529838 2.6086e-08 au q 3.18760562741027 1.6358e-07 au i 9.059533466736772 3.7888e-06 deg node 100.603779952058 2.9062e-05 deg peri 294.7432016773622 3.0422e-05 deg M 174.5627214787026 1.0636e-05 deg tp 2457589.972190042826 (2016-Jul-20.47219004) 8.0291e-05 TDB period 2908.92584214514 7.96 2.8541e-05 7.814e-08 d yr n .1237570221915743 1.2142e-09 deg/d Q 4.788412719649407 3.1321e-08 au   Orbit Determination Parameters    # obs. used (total)      2534      data-arc span      25560 days (69.98 yr)      first obs. used      1950-06-24      last obs. used      2020-06-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .42059      source      ORB      producer      Otto Matic      solution date      2020-Jun-23 15:32:42   Additional Information  Earth MOID = 2.20956 au   Jupiter MOID = .818673 au   T_jup = 2.999  [ 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 10.0   n/a MPO492768   diameter diameter 56.319 km 0.471 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)   rotation period rot_per 14.321 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List: [Ditteon, R.; Adam, A.; Doyel, M.; Gibson, J.; et al. (2018) Minor Planet Bull. 45, 13-16.] [Warner, B.D.; Stephens, R.D.; Coley, D.R. (2018) Minor Planet Bull. 45, 147-161.] geometric albedo albedo 0.054   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)   B-V BV 0.764   0.013 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=8.26, mean=9.15, max.=10.19) deg. U-B UB 0.386   0.105 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=9.01, mean=9.60, max.=10.19) deg. Tholen spectral type spec_T P:   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo 1529 Oterma (1938 BC)          Discovered 1938-Jan-26 by Vaisala, Y. at Turku Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1938 BC = 1950 PV = 1959 RD1 = A912 VO  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Jul-03 15:09 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin