+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   14921 (1994 QA) Classification: Main-belt Asteroid          SPK-ID: 2014921 [ 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 28 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2233433476533637 5.825e-08   a 2.332062652091672 1.0195e-08 au q 1.811211972436136 1.372e-07 au i 25.10984531959973 5.9341e-06 deg node 69.33673760124749 1.1953e-05 deg peri 121.2844594544389 1.4752e-05 deg M 256.9443654112515 1.1545e-05 deg tp 2459372.872832845211 (2021-Jun-07.37283285) 4.3315e-05 TDB period 1300.794666485046 3.56 8.5297e-06 2.335e-08 d yr n .2767539022686625 1.8148e-09 deg/d Q 2.852913331747208 1.2472e-08 au   Orbit Determination Parameters    # obs. used (total)      1258      data-arc span      15776 days (43.19 yr)      first obs. used      1976-11-17      last obs. used      2020-01-27      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50311      source      ORB      producer      Otto Matic      solution date      2020-Feb-22 21:07:11   Additional Information  Earth MOID = .893387 au   Jupiter MOID = 2.3399 au   T_jup = 3.413  [ 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 13.9   n/a MPO395148   diameter diameter 3.658 km 0.121 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   rotation period rot_per 12.9134 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List: [Galad, A.; Kornos, L.; Gajdos, S. (2009) Minor Planet Bull. 36, 13-15.] geometric albedo albedo 0.692   0.054 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   14921 (1994 QA)          Discovered 1994-Aug-16 by Garradd, G. J. at Siding Spring Reference: 20000523/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1994 QA = 1950 GG = 1992 BV3  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Sep-29 21:56 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin