+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   26377 (1999 FH4) Classification: Main-belt Asteroid          SPK-ID: 2026377 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 35 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3245321266259875 4.4644e-08   a 3.114803638453419 1.7778e-08 au q 2.103949789643767 1.4078e-07 au i 17.67952906386732 5.0976e-06 deg node 168.9531665953567 1.2582e-05 deg peri 185.7972974319879 1.364e-05 deg M 146.061605505796 5.1991e-06 deg tp 2458385.836973701367 (2018-Sep-24.33697370) 2.7767e-05 TDB period 2007.910897952372 5.50 1.719e-05 4.706e-08 d yr n .1792908242926123 1.5349e-09 deg/d Q 4.12565748726307 2.3547e-08 au   Orbit Determination Parameters    # obs. used (total)      1820      data-arc span      16930 days (46.35 yr)      first obs. used      1974-09-11      last obs. used      2021-01-17      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .45256      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 03:19:09   Additional Information  Earth MOID = 1.09789 au   Jupiter MOID = 1.32195 au   T_jup = 3.065  [ 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 12.87   n/a E2021B10   diameter diameter 7.630 km 0.907 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   rotation period rot_per 6.7755 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Owings, L.E. (2019) Minor Planet Bull. 46, 272-274.] [Rowe, B. (2019) Minor Planet Bull. 46, 353-356.] geometric albedo albedo 0.159   0.036 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   26377 (1999 FH4)          Discovered 1999-Mar-16 by Spacewatch at Kitt Peak Reference: 20010705/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1999 FH4 = 1974 QN2 = 2000 GJ90 = 2016 EW202  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Feb-27 20:14 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin