+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   825 Tanina (A916 FH) Classification: Main-belt Asteroid          SPK-ID: 2000825 [ 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 41 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .07551031688944153 1.4277e-08   a 2.225379461610438 4.1554e-09 au q 2.057340353264979 3.0982e-08 au i 3.399826072278233 1.0412e-06 deg node 101.4057031037427 1.4307e-05 deg peri 111.3568789146502 2.141e-05 deg M 172.4338922286242 1.2088e-05 deg tp 2458619.702590319785 (2019-May-16.20259032) 4.0388e-05 TDB period 1212.563636896023 3.32 3.3963e-06 9.299e-09 d yr n .2968916344230351 8.3157e-10 deg/d Q 2.393418569955897 4.4692e-09 au   Orbit Determination Parameters    # obs. used (total)      3292      data-arc span      42509 days (116.38 yr)      first obs. used      1904-10-17      last obs. used      2021-03-06      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .39795      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 11:30:06   Additional Information  Earth MOID = 1.05249 au   Jupiter MOID = 2.56943 au   T_jup = 3.640  [ 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 11.49   n/a E2021B10   diameter diameter 13.423 km 0.150 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 6.940 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Wisniewski, W.Z.; Michalowski, T.M.; Harris, A.W.; McMillan, R.S. (1997) Icarus 126, 395-449; 1995, Lunar & Planetary Sci. XXVI, 1511-1512.] [Durech, J. (2006) IAU 2006, poster paper.] [Kryszczynska A.; et al. (2008) Astron. Astrophys.; in preparation.] [Durech, J.; Kaasalainen, M.; Warner, B.D.; Fauerbach, M.; et al. (2009) Astron. Astrophys. 493, 291-297.] [Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.] [Ferrero, A. (2012) Minor Planet Bull. 39, 138-139.] [Kryszczynska, A.; Colas, F.; Polinska, M.; Hirsch, R.; et al. (2012) Astron. Astrophys. 546, A72.] geometric albedo albedo 0.275   0.042 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   B-V BV 0.912   0.041 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=5.91, mean=8.52, max.=10.36) deg. U-B UB 0.525   0.089 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=5.91 deg. Tholen spectral type spec_T SR   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices 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) 825 Tanina (A916 FH)          Discovered 1916-Mar-27 by Neujmin, G. at Simeis Independent discovery Apr. 3 by M. Wolf, Heidelberg, was announced first. Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  A916 FH = A904 UB  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-20 08:40 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin