+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   21804 Vaclavneumann (1999 TC8) Classification: Outer Main-belt Asteroid          SPK-ID: 2021804 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 43 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2670848823943264 4.2093e-08   a 3.934106302334254 3.9981e-08 au q 2.883365983248531 1.7162e-07 au i 3.836240592118011 4.7323e-06 deg node 97.96309983427746 7.6731e-05 deg peri 261.2718974247986 7.7331e-05 deg M 268.4547085282549 1.141e-05 deg tp 2459925.271444165530 (2022-Dec-11.77144417) 9.8559e-05 TDB period 2850.148988603322 7.80 4.3448e-05 1.19e-07 d yr n .1263091864458683 1.9255e-09 deg/d Q 4.984846621419976 5.0659e-08 au   Orbit Determination Parameters    # obs. used (total)      588      data-arc span      10490 days (28.72 yr)      first obs. used      1991-10-03      last obs. used      2020-06-22      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .56485      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 03:53:38   Additional Information  Earth MOID = 1.8817 au   Jupiter MOID = .521777 au   T_jup = 2.995  [ 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 14.38   n/a E2021B10   diameter diameter 9.586 km 1.069 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)   geometric albedo albedo 0.040   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)   21804 Václavneumann           Discovered 1999 Oct. 4 by L. Šarounová at Ondřejov. Václav Neumann (1920-1995) was the head conductor of the Czech Philharmonic Orchestra during 1968-1990. He became famous especially for his interpretation of the work of Martin{u°}, Mahler, Janáček and Dvořák. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20020526/MPCPages.arc Last Updated: 2003-10-02 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-20 11:37 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin