+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 58 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .08348692561046443 4.7606e-08   a 2.844455678522181 1.3336e-08 au q 2.606980818887136 1.3329e-07 au i 2.882459465107104 4.1918e-06 deg node 135.9865085496376 7.9916e-05 deg peri 220.5744583496347 8.2697e-05 deg M 187.417308021966 2.2533e-05 deg tp 2460040.524439802944 (2023-Apr-06.02443980) 0.00011087 TDB period 1752.254498194696 4.80 1.2323e-05 3.374e-08 d yr n .2054496081310672 1.4448e-09 deg/d Q 3.081930538157226 1.4449e-08 au   Orbit Determination Parameters    # obs. used (total)      1960      data-arc span      9646 days (26.41 yr)      first obs. used      1994-10-09      last obs. used      2021-03-07      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .50077      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 04:14:30   Additional Information  Earth MOID = 1.60143 au   Jupiter MOID = 2.30001 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 13.81   n/a E2021B10   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. 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: [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 ] 2021-Apr-16 04:14 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin