+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   325 Heidelberga (A892 EA) Classification: Outer Main-belt Asteroid          SPK-ID: 2000325 [ 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 69 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1535897216516402 3.624e-08   a 3.224122756554922 1.4919e-08 au q 2.728930639804932 1.146e-07 au i 8.548028904988977 3.6983e-06 deg node 344.3566865216927 2.819e-05 deg peri 69.4969276911651 3.1618e-05 deg M 246.0539975388224 1.5297e-05 deg tp 2459669.786974681717 (2022-Mar-31.28697468) 9.274e-05 TDB period 2114.539393056019 5.79 1.4677e-05 4.018e-08 d yr n .1702498431489201 1.1817e-09 deg/d Q 3.719314873304911 1.7211e-08 au   Orbit Determination Parameters    # obs. used (total)      3622      data-arc span      47008 days (128.70 yr)      first obs. used      1892-03-04      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .35199      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 01:52:44   Additional Information  Earth MOID = 1.75466 au   Jupiter MOID = 1.77455 au   T_jup = 3.152  [ 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 8.7   n/a MPO492752 IRAS observations used: 18 diameter diameter 75.72 km 1.7 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 18 rotation period rot_per 6.737 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Harris, A.W.; Young, J.W.; Dockweiler, T.; Gibson, J.; et al. (1992) Icarus 95, 115-147.] [Behrend, R. (2012) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Behrend, R. (2017) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.] geometric albedo albedo 0.1068   0.005 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 18 B-V BV 0.714   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=8.99 deg. U-B UB 0.268   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=8.99 deg. Tholen spectral type spec_T M   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices; used ground-based radiometric albedo 325 Heidelberga (A892 EA)          Discovered 1892-Mar-04 by Wolf, M. at Heidelberg Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  A892 EA = 1949 HQ  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-24 23:39 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin