+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1027 Aesculapia (A923 YO11) Classification: Main-belt Asteroid          SPK-ID: 2001027 [ 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 .1293375581629867 3.7609e-08   a 3.153914717860101 1.362e-08 au q 2.74599508959777 1.2075e-07 au i 1.252909371507742 4.0889e-06 deg node 29.34659724485043 0.0001672 deg peri 132.0743694547368 0.00016778 deg M 332.9416365464653 1.4828e-05 deg tp 2459154.270267831397 (2020-Oct-31.77026783) 8.4582e-05 TDB period 2045.847913690862 5.60 1.3253e-05 3.628e-08 d yr n .1759661593566519 1.1399e-09 deg/d Q 3.561834346122431 1.5382e-08 au   Orbit Determination Parameters    # obs. used (total)      3157      data-arc span      41216 days (112.84 yr)      first obs. used      1908-01-13      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .4579      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 01:57:49   Additional Information  Earth MOID = 1.75454 au   Jupiter MOID = 1.41685 au   T_jup = 3.193  [ hide covariance matrix ] Orbital Elements at Epoch 2456201.5 (2012-Oct-01.0) TDB Reference: JPL 40 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1316745873920416 3.7373e-08   q 2.734688253305222 1.1999e-07 au tp 2457114.728569363416 (2015-Apr-02.22856936) 8.021e-05 TDB node 29.43842416725336 0.00016699 deg peri 133.2074241742926 0.00016756 deg i 1.254827557555074 4.0908e-06 deg   Orbit Determination Parameters    # obs. used (total)      3157      data-arc span      41216 days (112.84 yr)      first obs. used      1908-01-13      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .4579      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 01:57:49   Additional Information  Jupiter MOID = 1.41685 au   T_jup = 3.193  Orbit Covariance (6×6)   e q tp node peri i e 1.396773674305065E-15 -4.463755846651377E-15 9.484767501334424E-14 -1.218913110554605E-15 5.209124750628424E-14 -1.485096424148901E-16 q -4.463755846651377E-15 1.439867476474161E-14 -1.665908631888275E-13 2.279725353162506E-15 -1.549966846791318E-13 5.451025068229353E-16 tp 9.484767501334424E-14 -1.665908631888275E-13 6.433663247048509E-9 -1.756099987291137E-12 1.117391331279762E-9 1.763178423045646E-14 node -1.218913110554605E-15 2.279725353162506E-15 -1.756099987291137E-12 2.788653470223088E-8 -2.787955430383641E-8 -8.366480066812137E-11 peri 5.209124750628424E-14 -1.549966846791318E-13 1.117391331279762E-9 -2.787955430383641E-8 2.807613154791067E-8 8.363090523787972E-11 i -1.485096424148901E-16 5.451025068229353E-16 1.763178423045646E-14 -8.366480066812137E-11 8.363090523787972E-11 1.673435769293765E-11 [ 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 10.9   n/a MPO452172   diameter diameter 31.225 km 0.164 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 13.529 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: [Hess, K.; Bruner, M.; Ditteon, R. (2017) Minor Planet Bull. 44, 3-5.] geometric albedo albedo 0.129   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   1027 Aesculapia (A923 YO11)          Discovered 1923-Nov-11 by Van Biesbroeck, G. at Williams Bay Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  A923 YO11 = 1942 DH = 1977 LP1 = A899 PE = A908 AE  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-22 10:32 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin