+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1002 Olbersia (A923 PJ) Classification: Main-belt Asteroid          SPK-ID: 2001002 [ 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 40 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1550632438616399 2.5385e-08   a 2.787510026919238 9.3872e-09 au q 2.355269679848294 7.4656e-08 au i 10.77030411876718 1.0416e-06 deg node 343.7201127036634 5.6895e-06 deg peri 355.1111440985871 7.8639e-06 deg M 319.3805600503539 4.0405e-06 deg tp 2459392.302610889092 (2021-Jun-26.80261089) 1.9471e-05 TDB period 1699.898866298246 4.65 8.5868e-06 2.351e-08 d yr n .2117773046016246 1.0698e-09 deg/d Q 3.219750373990182 1.0843e-08 au   Orbit Determination Parameters    # obs. used (total)      2740      data-arc span      31282 days (85.65 yr)      first obs. used      1935-02-08      last obs. used      2020-10-01      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .41663      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 11:47:50   Additional Information  Earth MOID = 1.34492 au   Jupiter MOID = 2.17655 au   T_jup = 3.287  [ 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 10.99   n/a E2021B10   diameter diameter 22.938 km 0.154 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 10.244 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.] geometric albedo albedo 0.147   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   1002 Olbersia (A923 PJ)          Discovered 1923-Aug-15 by Albitzkij, V. at Simeis Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  A923 PJ = 1956 UR  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-20 02:17 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin