+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   2825 Crosby (1938 SD1) Classification: Main-belt Asteroid          SPK-ID: 2002825 [ 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 38 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1741346800838505 1.4245e-08   a 2.245624580122906 5.2011e-09 au q 1.854583462274773 3.2598e-08 au i 3.519187550149777 8.076e-07 deg node 329.3668803595538 8.0902e-06 deg peri 81.98573194984488 9.3941e-06 deg M 118.6419172692358 5.4764e-06 deg tp 2458795.420922331559 (2019-Nov-07.92092233) 1.8351e-05 TDB period 1229.147937905521 3.37 4.2703e-06 1.169e-08 d yr n .2928858186211851 1.0175e-09 deg/d Q 2.636665697971039 6.1068e-09 au   Orbit Determination Parameters    # obs. used (total)      2618      data-arc span      30139 days (82.52 yr)      first obs. used      1938-09-16      last obs. used      2021-03-23      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .42998      source      ORB      producer      Otto Matic      solution date      2021-May-03 20:32:44   Additional Information  Earth MOID = .868335 au   Jupiter MOID = 2.73094 au   T_jup = 3.608  [ 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 13.31   n/a MPCxxxxx   diameter diameter 5.065 km 0.151 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 2.8135 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.] [Aznar, A.M. (2017) Minor Planet Bull. 44, 276-279.] [Pray, D.P.; Pravec, P.; Vrastil, V.; Hornoch, K; et al. (2017) CBET 4371.] geometric albedo albedo 0.301   0.039 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   2825 Crosby (1938 SD1)          Discovered 1938-Sep-19 by Jackson, C. at Johannesburg (UO) Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1938 SD1 = 1948 RA = 1972 XA1  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-May-11 14:07 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin