+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   21695 Hannahwolf (1999 RG49) Classification: Main-belt Asteroid          SPK-ID: 2021695 [ 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 23 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2158978325817021 3.9484e-08   a 2.439958327779905 8.5933e-09 au q 1.913176613222549 9.7911e-08 au i 3.33147551610124 4.3872e-06 deg node 112.4985089575968 7.2889e-05 deg peri 212.7438138966541 7.3523e-05 deg M 212.3085055338048 1.1085e-05 deg tp 2459771.616917270318 (2022-Jul-11.11691727) 4.4289e-05 TDB period 1392.105151081496 3.81 7.3543e-06 2.013e-08 d yr n .2586011550351092 1.3662e-09 deg/d Q 2.966740042337261 1.0449e-08 au   Orbit Determination Parameters    # obs. used (total)      1253      data-arc span      16329 days (44.71 yr)      first obs. used      1976-06-30      last obs. used      2021-03-15      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .5583      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 03:51:46   Additional Information  Earth MOID = .900229 au   Jupiter MOID = 2.3718 au   T_jup = 3.468  [ 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 15.01   n/a E2021B10   diameter diameter 2.178 km 0.191 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   geometric albedo albedo 0.372   0.120 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   21695 Hannahwolf           Discovered 1999 Sept. 7 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. Hannah Louise Wolf (b. 1990) was awarded first place and Best in Category in the 2006 Intel International Science and Engineering Fair for her earth science project. She also received the Intel Foundation Young Scientist Award. She attends the Parkland High School, Allentown, Pennsylvania, U.S.A. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20060711/MPCPages.arc Last Updated: 2006-07-17 Alternate Designations  1999 RG49 = 1976 MP = 1998 GY12  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-16 12:15 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin