+ 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 | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 34 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1740469957195448 2.8109e-08   a 2.245877181036165 5.6794e-09 au q 1.85498900492174 6.2221e-08 au i 3.519042504714006 3.5825e-06 deg node 329.3666001966837 5.0248e-05 deg peri 82.02538104196508 5.1734e-05 deg M 60.03796227445184 1.0365e-05 deg tp 2458795.477807492450 (2019-Nov-07.97780749) 3.5501e-05 TDB period 1229.355336300708 3.37 4.6632e-06 1.277e-08 d yr n .2928364073183978 1.1108e-09 deg/d Q 2.63676535715059 6.6679e-09 au   Orbit Determination Parameters    # obs. used (total)      2443      data-arc span      30012 days (82.17 yr)      first obs. used      1938-09-16      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .42811      source      ORB      producer      Otto Matic      solution date      2020-Dec-17 19:45:38   Additional Information  Earth MOID = .86958 au   Jupiter MOID = 2.73002 au   T_jup = 3.608  [ 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 13.2   n/a MPO347542   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 [ show close-approach data ] Alternate Designations  1938 SD1 = 1948 RA = 1972 XA1  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-23 21:49 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin