+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   120615 (1995 WO27) Classification: Main-belt Asteroid          SPK-ID: 2120615 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 21 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .075417934120301 4.7776e-08   a 2.71052050132514 1.6901e-08 au q 2.506098644724476 1.3094e-07 au i 3.767685829157777 5.3629e-06 deg node 30.21188549790883 6.1632e-05 deg peri 15.94789066941187 7.0942e-05 deg M 211.7819723062237 3.7838e-05 deg tp 2459871.582634361788 (2022-Oct-19.08263436) 0.00017489 TDB period 1629.96196973675 4.46 1.5245e-05 4.174e-08 d yr n .2208640487839986 2.0657e-09 deg/d Q 2.914942357925805 1.8176e-08 au   Orbit Determination Parameters    # obs. used (total)      583      data-arc span      9953 days (27.25 yr)      first obs. used      1993-03-24      last obs. used      2020-06-23      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .57463      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 17:07:22   Additional Information  Earth MOID = 1.51455 au   Jupiter MOID = 2.36851 au   T_jup = 3.356  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.83   n/a E2021B55   diameter diameter 3.920 km 0.089 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.060   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   120615 (1995 WO27)          Discovered 1995-Nov-19 by Spacewatch at Kitt Peak Reference: 20060314/Numbers.arc Last Updated: 2006-03-23 Alternate Designations  1995 WO27 = 2002 HE16  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-21 15:32 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin