+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   77185 Cherryh (2001 FE9) Classification: Main-belt Asteroid          SPK-ID: 2077185 [ 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 16 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1741390728484898 5.1843e-08   a 2.597719354818799 1.3296e-08 au q 2.145354914850076 1.3373e-07 au i 3.144751448213724 6.3327e-06 deg node 12.62668553400102 8.5767e-05 deg peri 231.4086946800804 8.7232e-05 deg M 211.33885945829 1.4869e-05 deg tp 2459832.012180813469 (2022-Sep-09.51218081) 6.3587e-05 TDB period 1529.279166461545 4.19 1.1741e-05 3.215e-08 d yr n .2354050247300302 1.8073e-09 deg/d Q 3.050083794787521 1.5612e-08 au   Orbit Determination Parameters    # obs. used (total)      497      data-arc span      11043 days (30.23 yr)      first obs. used      1990-10-24      last obs. used      2021-01-17      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .56852      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 13:30:05   Additional Information  Earth MOID = 1.13261 au   Jupiter MOID = 1.97859 au   T_jup = 3.393  [ 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 15.9   n/a MPO449486   diameter diameter 3.985 km 0.166 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.049   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   77185 Cherryh           Discovered 2001 Mar. 20 by D. Wells and A. Cruz at Needville. C. J. Cherryh (b. 1942), of Spokane, Washington, is the visionary author of more than 40 novels and three-time winner of the prestigious Hugo Award. She has challenged us to be worthy of the stars by imagining how mankind might grow to live among them. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20040713/MPCPages.arc Last Updated: 2004-07-14 [ show close-approach data ] Alternate Designations  2001 FE9 = 1998 TG27  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-19 12:56 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin