+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   26312 Ciardi (1998 TG34) Classification: Main-belt Asteroid          SPK-ID: 2026312 [ 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 28 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .192430961545076 3.7165e-08   a 2.303839230290652 8.0981e-09 au q 1.860509231960554 8.3948e-08 au i 6.621791901278315 4.7216e-06 deg node 183.2995718574229 3.0818e-05 deg peri 123.451483188533 3.4255e-05 deg M 187.2200799703297 1.8583e-05 deg tp 2459813.509843975739 (2022-Aug-22.00984398) 6.7357e-05 TDB period 1277.252262840322 3.50 6.7344e-06 1.844e-08 d yr n .2818550496825434 1.4861e-09 deg/d Q 2.74716922862075 9.6564e-09 au   Orbit Determination Parameters    # obs. used (total)      1503      data-arc span      8715 days (23.86 yr)      first obs. used      1997-03-10      last obs. used      2021-01-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50035      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 03:18:45   Additional Information  Earth MOID = .853974 au   Jupiter MOID = 2.53439 au   T_jup = 3.556  [ 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 14.44   n/a E2021B10   diameter diameter 2.902 km 0.290 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)   geometric albedo albedo 0.451   0.128 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)   26312 Ciardi           Discovered 1998 Oct. 14 by the Lowell Observatory Near-Earth Object Search at the Anderson Mesa Station. David Ciardi (b. 1969) is an astronomer at the California Institute of Technology. His research interests include detection, validation and characterization of extrasolar planets, as well as characterization of young stellar objects. 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 2019-05-18 Last Updated: 2019-05-29 Alternate Designations  1998 TG34 = 1997 EK57  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Feb-27 19:54 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin