+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   8251 Isogai (1980 VA) Classification: Mars-crossing Asteroid          SPK-ID: 2008251 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 26 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2639597729588934 3.6861e-08   a 2.25426997761384 6.4683e-09 au q 1.659233386134841 8.4439e-08 au i 3.210493198826766 4.6876e-06 deg node 169.2026606598737 6.3148e-05 deg peri 233.0876209378502 6.3626e-05 deg M 251.0053711484789 8.8195e-06 deg tp 2459374.791456116528 (2021-Jun-09.29145612) 3.1232e-05 TDB period 1236.252883483896 3.38 5.3209e-06 1.457e-08 d yr n .2912025563778509 1.2533e-09 deg/d Q 2.849306569092839 8.1757e-09 au   Orbit Determination Parameters    # obs. used (total)      1376      data-arc span      14514 days (39.74 yr)      first obs. used      1980-10-13      last obs. used      2020-07-09      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .53363      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 03:22:11   Additional Information  Earth MOID = .670137 au   Jupiter MOID = 2.56678 au   T_jup = 3.576  [ 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 15.3   n/a MPO337325   diameter diameter 4.339 km 1.061 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)   geometric albedo albedo 0.079   0.052 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)   8251 Isogai           Discovered 1980 Nov. 8 by T. Furuta at Tokai. Rensuke Isogai (b. 1941), a high-school classmate of the discoverer, is an electrical engineer and amateur astronomer. He influenced the discoverer in astronomy, who began to observe stars with a telescope borrowed from him. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20001013/MPCPages.arc Last Updated: 2013-03-29 Alternate Designations  1980 VA = 1980 VL = 1990 RX  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-28 13:22 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin