+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   3415 Danby (1928 SL) Classification: Outer Main-belt Asteroid          SPK-ID: 2003415 [ 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 36 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2481857684937618 1.5193e-08   a 3.963454809829472 2.2817e-08 au q 2.979781731961647 5.8583e-08 au i 1.366922575502682 8.2024e-07 deg node 253.9571905074819 4.2485e-05 deg peri 136.4319908978358 4.2979e-05 deg M 236.198663140594 3.9445e-06 deg tp 2460191.633434711189 (2023-Sep-04.13343471) 3.6656e-05 TDB period 2882.101644033411 7.89 2.4888e-05 6.814e-08 d yr n .1249088493271151 1.0786e-09 deg/d Q 4.947127887697295 2.848e-08 au   Orbit Determination Parameters    # obs. used (total)      3026      data-arc span      33587 days (91.96 yr)      first obs. used      1928-09-22      last obs. used      2020-09-06      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .46462      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 15:05:25   Additional Information  Earth MOID = 1.98442 au   Jupiter MOID = .534287 au   T_jup = 3.003  [ 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 11.05   n/a E2021B10   diameter diameter 36.582 km 0.615 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)   rotation period rot_per 5.675 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: [Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Warner, B.D.; Higgins, D. (2008) Minor Planet Bull. 35, 103.] [Apostolovska, G.; Ivanova, V. Kostov, A. (2009) Minor Planet Bull. 36, 27-28.] [Behrend, R. (2015) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Warner, B.D.; Stephens, R.D. (2018) Minor Planet Bull. 45, 262-265.] geometric albedo albedo 0.063   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)   3415 Danby (1928 SL)          Discovered 1928-Sep-22 by Reinmuth, K. at Heidelberg Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1928 SL = 1967 RL = 1983 RV  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jun-25 01:57 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin