+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   16813 Ronmastaler (1997 UT6) Classification: Main-belt Asteroid          SPK-ID: 2016813 [ 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 37 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1338417941757478 1.5902e-08   a 2.18314807815427 5.0715e-09 au q 1.890951622422767 3.4673e-08 au i 3.074606091017868 7.2371e-07 deg node 208.4176139936287 6.5414e-06 deg peri 341.2534690878945 9.1316e-06 deg M 275.6380853532937 5.6766e-06 deg tp 2459476.600469279156 (2021-Sep-19.10046928) 1.8997e-05 TDB period 1178.211392626054 3.23 4.1055e-06 1.124e-08 d yr n .3055478857640432 1.0647e-09 deg/d Q 2.475344533885773 5.7503e-09 au   Orbit Determination Parameters    # obs. used (total)      2347      data-arc span      14380 days (39.37 yr)      first obs. used      1981-10-30      last obs. used      2021-03-14      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .48688      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 01:42:43   Additional Information  Earth MOID = .890806 au   Jupiter MOID = 2.48217 au   T_jup = 3.665  [ 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 14.37   n/a E2021B10   diameter diameter 2.942 km 0.417 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)   rotation period rot_per 8.293 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so. Published Reference List: [Hayes-Gehrke, M.N.; Cameron, H.; Gulotta, C.; He, Y.; et al. (2015) Minor Planet Bull. 42, 244.] geometric albedo albedo 0.400   0.147 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)   16813 Ronmastaler           Discovered 1997 Oct. 23 at Kitt Peak. Ronald A. Mastaler (b. 1955) is an atmospheric scientist and a fluent translator and interpreter of the Russian language. With the Spacewatch project since 2013, he has been a prolific asteroid astrometrist. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: MPC batch dated 2019-12-12 Last Updated: 2019-12-13 [ show close-approach data ] Alternate Designations  1997 UT6 = 1981 UU5 = 1994 WC3  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-15 04:18 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin