+ 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 ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 39 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1337785865974361 1.5871e-08   a 2.183191799794029 5.0799e-09 au q 1.891127486546471 3.462e-08 au i 3.074643924462614 7.2338e-07 deg node 208.4087680330526 6.5401e-06 deg peri 341.2342028564202 9.1272e-06 deg M 335.5432640659604 5.768e-06 deg tp 2459476.544640350408 (2021-Sep-19.04464035) 1.9003e-05 TDB period 1178.246786646617 3.23 4.1123e-06 1.126e-08 d yr n .3055387072385644 1.0664e-09 deg/d Q 2.475256113041587 5.7595e-09 au   Orbit Determination Parameters    # obs. used (total)      2389      data-arc span      14440 days (39.53 yr)      first obs. used      1981-10-30      last obs. used      2021-05-13      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .48508      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 17:43:27   Additional Information  Earth MOID = .892399 au   Jupiter MOID = 2.48133 au   T_jup = 3.665  [ 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 14.38   n/a MPCxxxxx   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 Alternate Designations  1997 UT6 = 1981 UU5 = 1994 WC3  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Aug-03 00:18 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin