+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1223 Neckar (1931 TG) Classification: Main-belt Asteroid          SPK-ID: 2001223 [ 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 46 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .06022328934076153 3.3584e-08   a 2.869965573119101 9.9757e-09 au q 2.697126806011125 9.6459e-08 au i 2.54411336363585 3.7991e-06 deg node 40.80213954346419 7.9368e-05 deg peri 15.12253837183671 8.5358e-05 deg M 78.21363303482664 3.0456e-05 deg tp 2458814.672289164758 (2019-Nov-27.17228916) 0.00015039 TDB period 1775.879351350925 4.86 9.2591e-06 2.535e-08 d yr n .2027164737999489 1.0569e-09 deg/d Q 3.042804340227077 1.0576e-08 au   Orbit Determination Parameters    # obs. used (total)      3580      data-arc span      41354 days (113.22 yr)      first obs. used      1907-11-02      last obs. used      2021-01-21      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .4133      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 00:53:40   Additional Information  Earth MOID = 1.70788 au   Jupiter MOID = 2.1686 au   T_jup = 3.294  [ hide covariance matrix ] Orbital Elements at Epoch 2456434.5 (2013-May-22.0) TDB Reference: JPL 46 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .05743279235091705 3.3421e-08   q 2.705537057247432 9.5562e-08 au tp 2457030.209835045245 (2015-Jan-07.70983505) 0.00016024 TDB node 40.86142022475863 7.943e-05 deg peri 13.37735217949522 8.6069e-05 deg i 2.544760160874983 3.7943e-06 deg   Orbit Determination Parameters    # obs. used (total)      3580      data-arc span      41354 days (113.22 yr)      first obs. used      1907-11-02      last obs. used      2021-01-21      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .4133      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 00:53:40   Additional Information  Jupiter MOID = 2.1686 au   T_jup = 3.294  Orbit Covariance (6×6)   e q tp node peri i e 1.116936669986097E-15 -3.178419952057392E-15 -6.757303370234271E-13 4.561438838504281E-16 -1.542325815071525E-13 5.327300170750945E-17 q -3.178419952057392E-15 9.132043285382558E-15 1.738118226152473E-12 -1.305669512046093E-15 3.922445421998478E-13 -4.274155747452404E-17 tp -6.757303370234271E-13 1.738118226152473E-12 2.567626084023323E-8 -4.382923715659559E-12 5.323523166504652E-9 -8.964412678045341E-13 node 4.561438838504281E-16 -1.305669512046093E-15 -4.382923715659559E-12 6.309175692861107E-9 -6.30356112799672E-9 -1.294392989396826E-11 peri -1.542325815071525E-13 3.922445421998478E-13 5.323523166504652E-9 -6.30356112799672E-9 7.407795332693789E-9 1.274559341280833E-11 i 5.327300170750945E-17 -4.274155747452404E-17 -8.964412678045341E-13 -1.294392989396826E-11 1.274559341280833E-11 1.439693957149069E-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 10.56   n/a E2021B10   diameter diameter 22.783 km 0.213 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 7.81 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Slivan, S.M.; Binzel, R.P. (1996) Icarus 124, 452-470.] [Michalowski, T.; Pych, W.; Berthier, J.; Kryszczynska, A.; et al. (2000) Astron. Astrophys. Suppl. Ser. 146, 471-479.] [Slivan, S.M.; Binzel, R.P.; Crespo da Silva, L.D.; Kaasalainen, M.; et al. (2003) Icarus 162, 285-307.] [Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.] [Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.] [Chang, C.-K.; Lin, H.-W.; Ip, W.-H.; Prince, T.A.; et al. (2016) Astrophys. J. Sup. Ser. 227, A20.] [Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.] geometric albedo albedo 0.170   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   B-V BV 0.840   0.028 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=16.54, mean=16.54, max.=16.54) deg. U-B UB 0.405   0.092 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=16.54, mean=16.54, max.=16.54) 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 1223 Neckar (1931 TG)          Discovered 1931-Oct-06 by Reinmuth, K. at Heidelberg Independent discovery Oct. 11 by F. Rigaux, Uccle, was announced first. Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1931 TG = 1930 MN = 1931 TA1 = 1953 FC = A907 VD = A909 BD = A917 XC = A917 YA  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Mar-01 23:35 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin