+ 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 | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 113 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1521944445682469 2.727e-08   a 2.376489826938629 4.4425e-09 au q 2.014801277705615 6.5249e-08 au i 2.93560578744068 3.3346e-06 deg node 295.3965503382154 5.9012e-05 deg peri 127.345302107053 6.0117e-05 deg M 232.7505897816154 1.2551e-05 deg tp 2459473.494012922388 (2021-Sep-15.99401292) 4.7243e-05 TDB period 1338.142505806746 3.66 3.7522e-06 1.027e-08 d yr n .2690296425364364 7.5436e-10 deg/d Q 2.738178376171642 5.1186e-09 au   Orbit Determination Parameters    # obs. used (total)      3068      data-arc span      45360 days (124.19 yr)      first obs. used      1896-09-07      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .46575      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 01:54:26   Additional Information  Earth MOID = 1.0296 au   Jupiter MOID = 2.56139 au   T_jup = 3.524  [ 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 9.1   n/a MPO492755   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 [ show close-approach data ] Alternate Designations  A905 AE = A896 RB = A900 UC  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-17 19:56 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin