+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1129 Neujmina (1929 PH) Classification: Main-belt Asteroid          SPK-ID: 2001129 [ 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 49 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .08347257063188594 3.6218e-08   a 3.023145830312036 1.1655e-08 au q 2.770796076460823 1.0932e-07 au i 8.61883444036134 4.0952e-06 deg node 269.216426794964 2.6424e-05 deg peri 139.7240996715124 3.6951e-05 deg M 70.11401350609788 2.469e-05 deg tp 2458826.570783293990 (2019-Dec-09.07078329) 0.00013174 TDB period 1919.937417395966 5.26 1.1102e-05 3.04e-08 d yr n .1875061117816394 1.0843e-09 deg/d Q 3.27549558416325 1.2628e-08 au   Orbit Determination Parameters    # obs. used (total)      3151      data-arc span      34712 days (95.04 yr)      first obs. used      1926-01-10      last obs. used      2021-01-23      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .38741      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 00:52:50   Additional Information  Earth MOID = 1.78774 au   Jupiter MOID = 2.04068 au   T_jup = 3.223  [ 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 10.26   n/a E2021B10 IRAS observations used: 6 diameter diameter 34.576 km 0.196 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 5.0844 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Carbo, L.; Kragh, K.; Krotz, J.; Meiers, A.; et al. (2009) Minor Planet Bull. 36, 91-94.] [Ditteon, R.; West, J. (2011) Minor Planet Bull. 38, 214-217.] geometric albedo albedo 0.138   0.016 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   B-V BV 0.780   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=4.11 deg. U-B UB 0.410   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=4.11 deg. Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices; used ground-based radiometric albedo 1129 Neujmina (1929 PH)          Discovered 1929-Aug-08 by Parchomenko, P. at Simeis Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1929 PH = 1926 AE = A914 WE  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Feb-27 05:25 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin