+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   975 Perseverantia (A922 FE) Classification: Main-belt Asteroid          SPK-ID: 2000975 [ 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 40 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .03314035665864144 3.0429e-08   a 2.83284406217051 8.72e-09 au q 2.738962599591864 8.7637e-08 au i 2.555603400495772 3.6203e-06 deg node 38.67800672449873 7.7824e-05 deg peri 59.25077536875706 9.6724e-05 deg M 291.8657496609441 5.7097e-05 deg tp 2459330.106229524991 (2021-Apr-25.60622953) 0.00027626 TDB period 1741.535894774194 4.77 8.0411e-06 2.202e-08 d yr n .2067140855840225 9.5445e-10 deg/d Q 2.926725524749155 9.0089e-09 au   Orbit Determination Parameters    # obs. used (total)      3544      data-arc span      36028 days (98.64 yr)      first obs. used      1922-03-28      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .43866      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 01:57:31   Additional Information  Earth MOID = 1.75691 au   Jupiter MOID = 2.11375 au   T_jup = 3.310  [ 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 10.5   n/a MPO502162 IRAS observations used: 3 diameter diameter 22.169 km 0.237 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 7.267 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Behrend, R. (2003) 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] [Slivan, S.M.; Binzel, R.P.; Boroumand, S.C.; Pan M.W.; et al. (2008) Icarus 195, 226-276.] [Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.] geometric albedo albedo 0.246   0.024 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   B-V BV 0.845   0.007 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=6.01, mean=6.91, max.=7.80) deg. U-B UB 0.425   0.049 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=6.01, mean=6.91, max.=7.80) deg. Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices; used ground-based radiometric albedo 975 Perseverantia (A922 FE)          Discovered 1922-Mar-27 by Palisa, J. at Vienna Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  A922 FE = 1950 CK = A912 CB  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-23 02:50 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin