+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   2691 Sersic (1974 KB) Classification: Main-belt Asteroid          SPK-ID: 2002691 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 46 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .112048822905219 1.5123e-08   a 2.244283669464225 5.0287e-09 au q 1.992814326035353 3.3546e-08 au i 3.5937182963861 5.4741e-07 deg node 319.8350256823823 1.6457e-05 deg peri 277.2231406068128 1.7361e-05 deg M 1.755424824719518 7.9579e-06 deg tp 2459390.511820835417 (2021-Jun-25.01182084) 2.7142e-05 TDB period 1228.047176326377 3.36 4.1275e-06 1.13e-08 d yr n .2931483471806975 9.8528e-10 deg/d Q 2.495753012893097 5.5922e-09 au   Orbit Determination Parameters    # obs. used (total)      3241      data-arc span      26031 days (71.27 yr)      first obs. used      1950-03-21      last obs. used      2021-06-27      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .43929      source      ORB      producer      Otto Matic      solution date      2021-Jul-07 21:53:36   Additional Information  Earth MOID = .985114 au   Jupiter MOID = 2.51128 au   T_jup = 3.621  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 13.34   n/a MPO614063   diameter diameter 5.438 km 0.119 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   rotation period rot_per 3.8811 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Oey, J.; Pravec, P.; Kusnirak, P.; Morales, N.; et al. (2011) CBET 2766.] [Oey, J. (2016) Minor Planet Bull. 43, 45-51.] geometric albedo albedo 0.261   0.062 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   2691 Sersic (1974 KB)          Discovered 1974-May-18 by Felix Aguilar Observatory at El Leoncito Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1974 KB = 1938 UU = 1978 QR1  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jul-24 06:03 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin