+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   804 Hispania (A915 FK) Classification: Main-belt Asteroid          SPK-ID: 2000804 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 89 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .14078214187244 4.3402e-08   a 2.837171578828344 9.9442e-09 au q 2.437748487101277 1.2336e-07 au i 15.39850055470225 4.734e-06 deg node 347.5871856366002 1.4919e-05 deg peri 344.722103928061 2.1036e-05 deg M 247.2468217156083 1.7191e-05 deg tp 2459747.205093024590 (2022-Jun-16.70509302) 8.44e-05 TDB period 1745.528032854547 4.78 9.1771e-06 2.513e-08 d yr n .2062413167958549 1.0843e-09 deg/d Q 3.23659467055541 1.1344e-08 au   Orbit Determination Parameters    # obs. used (total)      2819      data-arc span      41389 days (113.32 yr)      first obs. used      1907-09-24      last obs. used      2021-01-17      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .4392      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 00:49:56   Additional Information  Earth MOID = 1.42963 au   Jupiter MOID = 2.16932 au   T_jup = 3.244  [ 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 7.94   n/a E2021B10 IRAS observations used: 16 magnitude slope G 0.18   n/a PDS3 (MPC 17260) Fit diameter diameter 137.952 km 1.964 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   rotation period rot_per 14.845 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Harris, A.W.; Young, J.W. (1983) Icarus 54, 59-109.] [Behrend, R. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Pray, D. (2004) Minor Planet Bull. 31, 34-36.] [Stephens, R.D. (2004) Minor Planet Bull. 31, 40-41.] [Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Behrend, R. (2010) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Stephens, R.D. (2014) Minor Planet Bull. 41, 92-95.] geometric albedo albedo 0.054   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   B-V BV 0.727   0.015 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=8; phase (min.=.89, mean=6.11, max.=15.07) deg. U-B UB 0.390   0.022 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=8; phase (min.=.89, mean=6.11, max.=15.07) deg. Tholen spectral type spec_T PC   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo SMASSII spectral type spec_B C   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) 804 Hispania (A915 FK)          Discovered 1915-Mar-20 by Comas Sola, J. at Barcelona Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  A915 FK = 1953 FU1 = A903 WA  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Feb-25 03:50 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin