+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   100035 (1991 PO8) Classification: Main-belt Asteroid          SPK-ID: 2100035 [ 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 28 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2791557747489704 3.5484e-08   a 2.767544192552474 1.1689e-08 au q 1.994968249328475 9.4896e-08 au i 7.288458372958885 4.241e-06 deg node 331.3891017749206 2.4171e-05 deg peri 26.17138423543904 2.5293e-05 deg M 115.4301427255 6.2533e-06 deg tp 2458661.291157641087 (2019-Jun-26.79115764) 2.8258e-05 TDB period 1681.668051912804 4.60 1.0654e-05 2.917e-08 d yr n .2140731636011756 1.3563e-09 deg/d Q 3.540120135776474 1.4952e-08 au   Orbit Determination Parameters    # obs. used (total)      1029      data-arc span      14055 days (38.48 yr)      first obs. used      1982-07-27      last obs. used      2021-01-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .48919      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 19:32:50   Additional Information  Earth MOID = .991894 au   Jupiter MOID = 1.93191 au   T_jup = 3.269  [ 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 15.23   n/a E2021B55   diameter diameter 6.535 km 0.316 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   geometric albedo albedo 0.038   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   100035 (1991 PO8)          Discovered 1991-Aug-05 by Holt, H. E. at Palomar Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] Alternate Designations  1991 PO8 = 1982 RL1 = 1991 RC12  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-02 21:50 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin