+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   2112 Ulyanov (1972 NP) Classification: Main-belt Asteroid          SPK-ID: 2002112 [ 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 40 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1368321750571992 3.2286e-08   a 2.253880636330845 5.3198e-09 au q 1.945477246542391 7.2679e-08 au i 3.372125498816695 3.6114e-06 deg node 243.6751925866911 5.7995e-05 deg peri 156.5211288917295 5.9405e-05 deg M 29.98473213412797 1.287e-05 deg tp 2459097.558031626535 (2020-Sep-05.05803163) 4.4124e-05 TDB period 1235.932622265035 3.38 4.3757e-06 1.198e-08 d yr n .291278014282239 1.0312e-09 deg/d Q 2.562284026119298 6.0477e-09 au   Orbit Determination Parameters    # obs. used (total)      3035      data-arc span      41028 days (112.33 yr)      first obs. used      1908-09-21      last obs. used      2021-01-19      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .42645      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 01:00:28   Additional Information  Earth MOID = .953112 au   Jupiter MOID = 2.81964 au   T_jup = 3.610  [ hide covariance matrix ] Orbital Elements at Epoch 2456725.5 (2014-Mar-09.0) TDB Reference: JPL 40 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1372193135039107 3.2443e-08   q 1.944655858475793 7.3056e-08 au tp 2456625.170781686218 (2013-Nov-28.67078169) 4.3105e-05 TDB node 243.7562562872778 5.7952e-05 deg peri 156.3478716221749 5.9341e-05 deg i 3.372951824602967 3.6134e-06 deg   Orbit Determination Parameters    # obs. used (total)      3035      data-arc span      41028 days (112.33 yr)      first obs. used      1908-09-21      last obs. used      2021-01-19      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .42645      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 01:00:28   Additional Information  Jupiter MOID = 2.81964 au   T_jup = 3.610  Orbit Covariance (6×6)   e q tp node peri i e 1.052531924437611E-15 -2.36542008993356E-15 8.687714568300545E-14 -1.66347515071124E-15 1.367971115462168E-14 2.262090941844038E-16 q -2.36542008993356E-15 5.337137985552014E-15 -2.037478770489359E-13 3.779883860470125E-15 -3.335550411193008E-14 -4.90846147031361E-16 tp 8.687714568300545E-14 -2.037478770489359E-13 1.858033509829897E-9 -9.218023651748716E-12 5.605291437608815E-10 -3.704763808217663E-13 node -1.66347515071124E-15 3.779883860470125E-15 -9.218023651748716E-12 3.358400185279719E-9 -3.354596328854978E-9 -1.233869228308803E-12 peri 1.367971115462168E-14 -3.335550411193008E-14 5.605291437608815E-10 -3.354596328854978E-9 3.521310341977247E-9 1.129253543072162E-12 i 2.262090941844038E-16 -4.90846147031361E-16 -3.704763808217663E-13 -1.233869228308803E-12 1.129253543072162E-12 1.305671149452952E-11 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 12.50   n/a E2021B10   diameter diameter 7.480 km 0.215 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   rotation period rot_per 3.041 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Maleszewski, C.; Clark, M. (2004) Minor Planet Bull. 31, 93-94.] [Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; et al. (2013) Astron. Astrophys. 551, A67.] [Benishek, V. (2014) Minor Planet Bull. 41, 126-127.] [Stephens, R.D. (2014) Minor Planet Bull. 41, 13-15.] [Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.] [Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.] geometric albedo albedo 0.380   0.044 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   2112 Ulyanov           Discovered 1972 July 13 by T. M. Smirnova at the Crimean Astrophysical Observatory. Named in memory of Aleksandr Ulyanov (1866-1887), eldest brother of V. I. Lenin. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: MPC 5283 Last Updated: 2007-10-23 Alternate Designations  1972 NP = 1949 YC = 1952 UU1 = 1962 RA = 1968 KB = 1969 UB2 = 1976 YD1 = A908 SC  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Mar-01 22:59 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin