+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1725 CrAO (1930 SK) Classification: Main-belt Asteroid          SPK-ID: 2001725 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 44 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .08815809296880293 3.5488e-08   a 2.903826603244724 1.0788e-08 au q 2.647830787590592 1.0219e-07 au i 3.170896817748343 3.3022e-06 deg node 119.0832495689244 6.9322e-05 deg peri 229.4213817726149 7.1734e-05 deg M 57.56069309279785 1.8159e-05 deg tp 2458711.513230412555 (2019-Aug-16.01323041) 9.1235e-05 TDB period 1807.400701095749 4.95 1.0072e-05 2.758e-08 d yr n .1991810669220984 1.1099e-09 deg/d Q 3.159822418898855 1.1739e-08 au   Orbit Determination Parameters    # obs. used (total)      2929      data-arc span      38420 days (105.19 yr)      first obs. used      1915-09-09      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .43359      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 02:02:21   Additional Information  Earth MOID = 1.64239 au   Jupiter MOID = 2.2032 au   T_jup = 3.278  [ hide covariance matrix ] Orbital Elements at Epoch 2456723.5 (2014-Mar-07.0) TDB Reference: JPL 44 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09119255374833202 3.5814e-08   q 2.638820467583897 1.0357e-07 au tp 2456896.553423224045 (2014-Aug-27.05342322) 8.7899e-05 TDB node 119.2422990132412 6.9354e-05 deg peri 227.9071497529973 7.1553e-05 deg i 3.170821995199907 3.3039e-06 deg   Orbit Determination Parameters    # obs. used (total)      2929      data-arc span      38420 days (105.19 yr)      first obs. used      1915-09-09      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .43359      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 02:02:21   Additional Information  Jupiter MOID = 2.2032 au   T_jup = 3.278  Orbit Covariance (6×6)   e q tp node peri i e 1.282655434441014E-15 -3.6928614208232E-15 3.28758649204336E-13 9.531884907492773E-15 7.073723939225602E-14 -3.008230859234429E-16 q -3.6928614208232E-15 1.072623564565409E-14 -1.070652046463335E-12 -2.799782320548507E-14 -2.314378946565822E-13 9.289441194662834E-16 tp 3.28758649204336E-13 -1.070652046463335E-12 7.726211839661259E-9 1.096429838561738E-11 1.568935547304109E-9 8.85651488842638E-13 node 9.531884907492773E-15 -2.799782320548507E-14 1.096429838561738E-11 4.809990050474802E-9 -4.800006470452179E-9 4.059720222693741E-11 peri 7.073723939225602E-14 -2.314378946565822E-13 1.568935547304109E-9 -4.800006470452179E-9 5.119775748086901E-9 -4.037091014506737E-11 i -3.008230859234429E-16 9.289441194662834E-16 8.85651488842638E-13 4.059720222693741E-11 -4.037091014506737E-11 1.091548869690571E-11 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 11.3   n/a MPO502170   diameter diameter 16.089 km 1.649 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   rotation period rot_per 21.45 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so. Published Reference List: [Slivan, S.M.; Binzel, R.P.; Boroumand, S.C.; Pan M.W.; et al. (2008) Icarus 195, 226-276.] geometric albedo albedo 0.220   0.236 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   1725 CrAO (1930 SK)          Discovered 1930-Sep-20 by Neujmin, G. at Simeis Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1930 SK = 1933 DF = 1950 TV3 = 1960 WL = 1965 UJ = A906 YP = A915 RK  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-27 11:45 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin