+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   2634 James Bradley (1982 DL) Classification: Outer Main-belt Asteroid          SPK-ID: 2002634 [ 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 47 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .04877538694471611 1.7007e-08   a 3.459738928372217 1.7801e-08 au q 3.290988823413164 5.9209e-08 au i 6.421450438220721 3.1465e-07 deg node 133.3467730678373 7.7725e-06 deg peri 333.2506578937192 1.8871e-05 deg M 45.86120767150494 1.8492e-05 deg tp 2458901.062350311813 (2020-Feb-21.56235031) 0.00011971 TDB period 2350.517122442143 6.44 1.8141e-05 4.967e-08 d yr n .1531577866686488 1.1821e-09 deg/d Q 3.628489033331269 1.867e-08 au   Orbit Determination Parameters    # obs. used (total)      3225      data-arc span      42412 days (116.12 yr)      first obs. used      1905-02-09      last obs. used      2021-03-24      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .42664      source      ORB      producer      Otto Matic      solution date      2021-May-03 20:24:33   Additional Information  Earth MOID = 2.30921 au   Jupiter MOID = 1.43811 au   T_jup = 3.123  [ 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 10.65   n/a E2021B10   diameter diameter 33.726 km 0.488 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 16.284 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so. Published Reference List: [Durech, J.; Hanus, J. (2018) Astron. Astrophys. 620, A91.] [Ferrero, A.; Bonamico, R. (2020) Minor Planet Bull. 47, 147-148.] geometric albedo albedo 0.107   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   2634 James Bradley (1982 DL)          Discovered 1982-Feb-21 by Bowell, E. at Flagstaff (AM) Discovered at the Anderson Mesa station, which is operated by the Lowell Observatory. Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1982 DL = 1931 FL = 1961 XH = 1963 FC = 1975 AO = 1976 GB1 = 1977 KP = A905 CC  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-May-14 01:38 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin