+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   22899 Alconrad (1999 TO14) Classification: Main-belt Asteroid          SPK-ID: 2022899 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 55 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .0832659580017521 4.8672e-08   a 2.845002780845975 1.3614e-08 au q 2.608110898781186 1.3589e-07 au i 2.882284746202173 4.2426e-06 deg node 135.9850404712824 8.0135e-05 deg peri 220.5623690372285 8.2973e-05 deg M 146.3550816915526 2.2598e-05 deg tp 2458287.929604093599 (2018-Jun-18.42960409) 0.0001094 TDB period 1752.760065188162 4.80 1.2581e-05 3.444e-08 d yr n .2053903481429179 1.4743e-09 deg/d Q 3.081894662910763 1.4748e-08 au   Orbit Determination Parameters    # obs. used (total)      1920      data-arc span      9330 days (25.54 yr)      first obs. used      1994-10-09      last obs. used      2020-04-25      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .49925      source      ORB      producer      Otto Matic      solution date      2020-May-20 05:35:45   Additional Information  Earth MOID = 1.60427 au   Jupiter MOID = 2.30005 au   T_jup = 3.301  [ 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 13.8   n/a MPO365524   diameter diameter 5.682 km 0.471 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   rotation period rot_per 4.03 h n/a LCDB (Rev. 2019-August); 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: [Polishook, D.; Brosch, N.; Prialnik, D. (2011) Icarus 212, 167-174.] geometric albedo albedo 0.181   0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   22899 Alconrad           Discovered 1999 Oct. 11 by K. Korlevic and M. Juric at Visnjan. Albert R. Conrad (b. 1953) has been a dedicated adaptive-optics (AO) scientist at several U.S. observatories. Using AO, he has co-discovered many satellites of asteroids and made disk-resolved studies of asteroids and planetary satellites for size/shape/pole and topography. He has developed many innovative AO techniques. 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 2016-06-20 Last Updated: 2016-06-21 Alternate Designations  1999 TO14 = 1998 ML48  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Oct-24 16:01 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin