+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   576 Emanuela (A905 SK) Classification: Main-belt Asteroid          SPK-ID: 2000576 [ 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 55 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1919085775932209 3.5199e-08   a 2.990088678915644 9.7717e-09 au q 2.416265013667349 1.0422e-07 au i 10.20385679584911 3.8982e-06 deg node 299.6089174844578 1.811e-05 deg peri 27.13878971156968 2.0265e-05 deg M 132.8194059021871 1.0817e-05 deg tp 2458503.739435398552 (2019-Jan-20.23943540) 5.4624e-05 TDB period 1888.532790466206 5.17 9.2577e-06 2.535e-08 d yr n .1906241722766857 9.3445e-10 deg/d Q 3.563912344163938 1.1647e-08 au   Orbit Determination Parameters    # obs. used (total)      3483      data-arc span      35383 days (96.87 yr)      first obs. used      1924-03-08      last obs. used      2021-01-21      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .39204      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 00:47:53   Additional Information  Earth MOID = 1.40717 au   Jupiter MOID = 1.78951 au   T_jup = 3.205  [ 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 9.41   n/a E2021B10   diameter diameter 74.378 km 0.319 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 20.372 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Pilcher, F. (2017) Minor Planet Bull. 44, 249-251.] [Pilcher, F. (2018) Minor Planet Bull. 45, 18-19.] [Pilcher, F. (2020) Minor Planet Bull. 47, 133-135.] geometric albedo albedo 0.055   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   576 Emanuela (A905 SK)          Discovered 1905-Sep-22 by Gotz, P. at Heidelberg Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  A905 SK = 1972 JG = A923 BA  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-01 17:34 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin