+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   255703 Stetson (2006 QN90) Classification: Main-belt Asteroid          SPK-ID: 2255703 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 12 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .117747833386782 6.4693e-08   a 2.420084719040944 2.3502e-08 au q 2.135124986761414 1.6012e-07 au i 5.144438735745081 7.4127e-06 deg node 11.44228826644875 6.8023e-05 deg peri 297.0649394104565 7.9872e-05 deg M 253.1954173415527 5.135e-05 deg tp 2459408.473230657859 (2021-Jul-12.97323066) 0.00019972 TDB period 1375.131659907414 3.76 2.0031e-05 5.484e-08 d yr n .2617931144311217 3.8134e-09 deg/d Q 2.705044451320475 2.6269e-08 au   Orbit Determination Parameters    # obs. used (total)      158      data-arc span      8973 days (24.57 yr)      first obs. used      1995-09-25      last obs. used      2020-04-19      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .54959      source      ORB      producer      Otto Matic      solution date      2020-May-21 14:25:04   Additional Information  Earth MOID = 1.12669 au   Jupiter MOID = 2.52829 au   T_jup = 3.499  [ 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 17.3   n/a MPO454899   255703 Stetson           Discovered 2006 Aug. 25 by D. D. Balam at Mauna Kea. Peter Brailey Stetson (b. 1952) develops freely-available software for the analysis of CCD images and spectra, notably DAOPHOT for precision photometry in crowded fields. His fundamental contributions to numerous fields have greatly advanced astrophysics since the deployment of CCDs in the 1980s. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20120207/MPCPages.arc Last Updated: 2012-02-09 [ show close-approach data ] Alternate Designations  2006 QN90 = 1995 SP44  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-23 18:05 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin