+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   25 Phocaea Classification: Main-belt Asteroid          SPK-ID: 2000025 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: JPL 66 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2557947764686046 3.2186e-08   a 2.399769053392399 2.5054e-09 AU q 1.785920664803615 7.7414e-08 AU i 21.59207161469373 3.7358e-06 deg node 214.2314127335602 9.3631e-06 deg peri 90.07078237178895 1.2657e-05 deg M 309.893159178056 7.0694e-06 deg tp 2456589.493610038519 (2013-Oct-23.99361004) 2.679e-05 JED period 1357.852510710875 3.72 2.1265e-06 5.822e-09 d yr n .2651245235843248 4.152e-10 deg/d Q 3.013617441981182 3.1463e-09 AU   Orbit Determination Parameters    # obs. used (total)      2134      data-arc span      55923 days (153.11 yr)      first obs. used      1860-03-11      last obs. used      2013-04-21      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .55185      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 12:31:32   Additional Information  Earth MOID = .920953 AU   T_jup = 3.389  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 7.83 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 21 diameter diameter 75.13 km 3.6 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 21 rotation period rot_per 9.9341 h n/a Asteroid Lightcurve DataBase (Rev. 2013-May-01) Published Reference List: [Groeneveld, I.; Kuiper, G.P. (1954) Astrophys. J. 120, 200-220.] [Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Buchheim, R.K. (2007) Minor Planet Bul. 34, 68-71.] [Pilcher, F. (2009) Minor Planet Bul. 36, 133-136.] [Pilcher, F. (2009) Minor Planet Bul. 36, 133-136.] [Pilcher, F. (2011) Minor Planet Bul. 38, 76-78.] geometric albedo albedo 0.2310   0.024 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 21 B-V BV .932 mag .014 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=6; phase (min.=9.54, mean=17.15, max.=25.41) deg. U-B UB .513 mag .030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=6; phase (min.=9.54, mean=17.15, max.=25.41) deg. Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo SMASSII spectral type spec_B S   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) 25 Phocaea          Discovered 1853-Apr-06 by Chacornac, J. at Marseille Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1956 GC  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-Jun-19 02:21 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin