+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   2579 Spartacus (1977 PA2) Classification: Main-belt Asteroid          SPK-ID: 2002579 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 38 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .07488364555959133 3.1336e-08   a 2.209962002166665 5.8139e-09 au q 2.044471990896252 6.8269e-08 au i 5.776630448037839 2.8732e-06 deg node 280.9399233041372 3.688e-05 deg peri 333.6230467651673 4.3898e-05 deg M 138.6697588237821 2.4691e-05 deg tp 2458738.273440766054 (2019-Sep-11.77344077) 8.2151e-05 TDB period 1199.984500843327 3.29 4.7354e-06 1.296e-08 d yr n .3000038748392155 1.1839e-09 deg/d Q 2.375452013437079 6.2493e-09 au   Orbit Determination Parameters    # obs. used (total)      2689      data-arc span      16981 days (46.49 yr)      first obs. used      1974-09-22      last obs. used      2021-03-20      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .41571      source      ORB      producer      Otto Matic      solution date      2021-May-03 20:21:51   Additional Information  Earth MOID = 1.02945 au   Jupiter MOID = 2.66045 au   T_jup = 3.648  [ 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 13.52   n/a MPCxxxxx   diameter diameter 4.604 km 0.369 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   rotation period rot_per 3.63599 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Warner, B.D. (2012) http://www.minorplanetobserver.com/PDO/PDOLightcurves.htm] [Dykhuis, M.J.; Molnar, L.A.; Gates, C.J.; Gonzales, J.A.; et al. (2016) Icarus 267, 174-203.] [Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.] geometric albedo albedo 0.526   0.102 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   SMASSII spectral type spec_B V   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002) 2579 Spartacus (1977 PA2)          Discovered 1977-Aug-14 by Chernykh, N. at Nauchnyj Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1977 PA2 = 1934 NG1 = 1974 SE4  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-May-16 09:49 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin