+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   554 Peraga (A905 AE) Classification: Main-belt Asteroid          SPK-ID: 2000554 [ 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 117 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1518934358144717 1.7212e-08   a 2.375497327841592 3.6513e-09 au q 2.014674876947637 4.0283e-08 au i 2.935283619859379 8.4986e-07 deg node 295.3938068758993 1.5594e-05 deg peri 127.5401538848595 1.5092e-05 deg M 286.3260595400374 7.737e-06 deg tp 2459474.179107069666 (2021-Sep-16.67910707) 2.9077e-05 TDB period 1337.304315881161 3.66 3.0833e-06 8.442e-09 d yr n .2691982637944251 6.2067e-10 deg/d Q 2.736319778735548 4.2059e-09 au   Orbit Determination Parameters    # obs. used (total)      3182      data-arc span      45402 days (124.30 yr)      first obs. used      1896-09-07      last obs. used      2020-12-28      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .46723      source      ORB      producer      Otto Matic      solution date      2021-May-03 18:34:36   Additional Information  Earth MOID = 1.02886 au   Jupiter MOID = 2.56243 au   T_jup = 3.524  [ 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 9.12   n/a E2021B10   diameter diameter 95.87 km 4.1 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 37 rotation period rot_per 13.7128 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Scaltriti, F.; Zappala, V. (1979) Icarus 39, 124-130.] [Behrend, R. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Higgins, D.; Warner, B.D.; Dymock, R.; Crow, M. (2007) Minor Planet Bull. 34, 30.] [Stephens, R.D. (2007) Minor Planet Bull. 34, 31-32.] geometric albedo albedo 0.0496   0.005 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 37 B-V BV 0.676   0.052 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=3.99, mean=10.80, max.=23.68) deg. U-B UB 0.342   0.039 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=3.99, mean=10.80, max.=23.68) deg. Tholen spectral type spec_T FC   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo SMASSII spectral type spec_B Ch   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002) 554 Peraga (A905 AE)          Discovered 1905-Jan-08 by Gotz, P. at Heidelberg Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  A905 AE = A896 RB = A900 UC  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jun-21 21:33 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin