+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1149 Volga (1929 PF) Classification: Main-belt Asteroid          SPK-ID: 2001149 [ 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 38 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09565228032435687 3.4891e-08   a 2.899169155217189 1.096e-08 au q 2.621857014474625 1.0123e-07 au i 11.74960361294379 3.9025e-06 deg node 261.4348153967852 2.011e-05 deg peri 116.3780498295292 2.9662e-05 deg M 98.38401256113205 2.149e-05 deg tp 2458507.745282853189 (2019-Jan-24.24528285) 0.00010749 TDB period 1803.054109656561 4.94 1.0225e-05 2.799e-08 d yr n .1996612292842235 1.1322e-09 deg/d Q 3.176481295959753 1.2009e-08 au   Orbit Determination Parameters    # obs. used (total)      2718      data-arc span      33334 days (91.26 yr)      first obs. used      1929-08-01      last obs. used      2020-11-05      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .39623      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 01:58:41   Additional Information  Earth MOID = 1.65076 au   Jupiter MOID = 2.28588 au   T_jup = 3.250  [ 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 10.5   n/a MPO502164 IRAS observations used: 22 diameter diameter 52.377 km 0.365 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 27.262 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Binzel, R.P. (1987) Icarus 72, 135-208.] [Polakis, T. (2019) Minor Planet Bull. 46, 78-80.] [Polakis, T. (2020) Minor Planet Bull. 47, 177-186.] geometric albedo albedo 0.038   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   B-V BV 0.690   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=6.12 deg. U-B UB 0.250   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=6.12 deg. 1149 Volga (1929 PF)          Discovered 1929-Aug-01 by Skvortsov, E. at Simeis Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-26 07:22 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin