+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   265 Anna (A887 DA) Classification: Main-belt Asteroid          SPK-ID: 2000265 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 30 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2674901722418736 3.7633e-08   a 2.419431586886122 7.336e-09 au q 1.772257414982524 9.1205e-08 au i 25.64924133543367 5.4411e-06 deg node 335.5282157790399 8.6723e-06 deg peri 251.6201229208747 1.285e-05 deg M 91.39205846833038 9.7564e-06 deg tp 2458651.540999120360 (2019-Jun-17.04099912) 3.7024e-05 TDB period 1374.575016933256 3.76 6.2518e-06 1.712e-08 d yr n .2618991292328137 1.1912e-09 deg/d Q 3.066605758789721 9.2983e-09 au   Orbit Determination Parameters    # obs. used (total)      2054      data-arc span      44126 days (120.81 yr)      first obs. used      1899-08-14      last obs. used      2020-06-06      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .41136      source      ORB      producer      Otto Matic      solution date      2020-Jun-23 15:10:27   Additional Information  Earth MOID = .912158 au   Jupiter MOID = 2.32925 au   T_jup = 3.335  [ 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 11.9   n/a MPO267706   diameter diameter 22.767 km 0.379 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   rotation period rot_per 11.681 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List: [Bembrick, C.S.; Bolt, G. (2005) Minor Planet Bull. 32, 18-19.] [Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; et al. (2013) Astron. Astrophys. 551, A67.] geometric albedo albedo 0.113   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   265 Anna (A887 DA)          Discovered 1887-Feb-25 by Palisa, J. at Vienna Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  A887 DA = 1933 QN = 1933 RC  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Aug-14 12:36 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin