+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   3996 Fugaku (1988 XG1) Classification: Main-belt Asteroid          SPK-ID: 2003996 [ 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 40 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1031896460969362 2.7787e-08   a 2.259164459718674 6.8445e-09 au q 2.026042078645528 6.3795e-08 au i 2.284226223124652 3.0508e-06 deg node 90.74931324469362 8.7318e-05 deg peri 156.4516929521788 8.8962e-05 deg M 326.4516877455852 1.8099e-05 deg tp 2459316.081512573566 (2021-Apr-11.58151257) 6.2492e-05 TDB period 1240.281305686496 3.40 5.6364e-06 1.543e-08 d yr n .29025673316969 1.3191e-09 deg/d Q 2.49228684079182 7.5508e-09 au   Orbit Determination Parameters    # obs. used (total)      2916      data-arc span      29892 days (81.84 yr)      first obs. used      1939-03-17      last obs. used      2021-01-17      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .42488      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 19:06:29   Additional Information  Earth MOID = 1.01096 au   Jupiter MOID = 2.51665 au   T_jup = 3.613  [ 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 13.11   n/a E2021B10   diameter diameter 5.231 km 0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   rotation period rot_per 7.193 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.] [Behrend, R. (2017) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Pravec, P.; Wolf, M.; Sarounova, L. (2017) http://www.asu.cas.cz/~ppravec/neo.htm] geometric albedo albedo 0.409   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   3996 Fugaku (1988 XG1)          Discovered 1988-Dec-05 by Arai, M. and Mori, H. at Yorii Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1988 XG1 = 1939 FZ = 1957 TB = 1981 SO5 = 1981 UM16  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-05 16:48 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin