+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   15631 Dellorusso (2000 HT57) Classification: Main-belt Asteroid          SPK-ID: 2015631 [ 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 38 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .07983775619017332 2.0448e-08   a 3.002180482774841 1.524e-08 au q 2.762493129352166 6.1855e-08 au i 10.54795735951474 4.7042e-07 deg node 205.39226614 1.5503e-06 deg peri 250.3572734080443 8.3941e-06 deg M 107.8047506727052 1.0765e-05 deg tp 2458631.530453964998 (2019-May-28.03045397) 5.4491e-05 TDB period 1900.000095491719 5.20 1.4467e-05 3.961e-08 d yr n .1894736746878069 1.4427e-09 deg/d Q 3.241867836197515 1.6457e-08 au   Orbit Determination Parameters    # obs. used (total)      2242      data-arc span      10306 days (28.22 yr)      first obs. used      1992-12-18      last obs. used      2021-03-07      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .45459      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 01:04:27   Additional Information  Earth MOID = 1.80064 au   Jupiter MOID = 1.9847 au   T_jup = 3.222  [ 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 12.82   n/a E2021B10   diameter diameter 9.336 km 0.231 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.222   0.024 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   15631 Dellorusso           Discovered 2000 Apr. 24 by the Lowell Observatory Near-Earth Object Search at the Anderson Mesa Station. Neil Dello Russo (b. 1966) has advanced the understanding of molecular processing and chemistry in comets, in particular of ethane and water, through his studies at the Catholic University of America and Goddard Space Flight Center. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20030318/MPCPages.arc Last Updated: 2003-10-02 [ show close-approach data ] Alternate Designations  2000 HT57 = 1994 CU2 = 1999 JL132  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-16 09:23 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin