+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   3918 Brel (1988 PE1) Classification: Main-belt Asteroid          SPK-ID: 2003918 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 38 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2087189391954136 3.8361e-08   a 2.243830498757328 5.7655e-09 au q 1.775500577322382 8.519e-08 au i 7.511422524115464 4.0002e-06 deg node 160.635566584997 2.2352e-05 deg peri 203.059329301039 2.3444e-05 deg M 206.3500684817295 8.5431e-06 deg tp 2459724.478379361306 (2022-May-24.97837936) 3.0238e-05 TDB period 1227.675240113206 3.36 4.7317e-06 1.295e-08 d yr n .2932371593376795 1.1302e-09 deg/d Q 2.712160420192273 6.9688e-09 au   Orbit Determination Parameters    # obs. used (total)      2787      data-arc span      32583 days (89.21 yr)      first obs. used      1931-11-04      last obs. used      2021-01-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .42021      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 01:14:12   Additional Information  Earth MOID = .773631 au   Jupiter MOID = 2.74592 au   T_jup = 3.592  [ 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 12.80   n/a E2021B10   diameter diameter 6.262 km 0.129 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   rotation period rot_per 3.0980 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Pravec, P.; Wolf, M.; Sarounova, L. (2005) http://www.asu.cas.cz/~ppravec/neo.htm] [Pravec, P.; Wolf, M.; Sarounova, L. (2007) http://www.asu.cas.cz/~ppravec/neo.htm] [Dykhuis, M.J.; Molnar, L.A.; Gates, C.J.; Gonzales, J.A.; et al. (2016) Icarus 267, 174-203.] [Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.] geometric albedo albedo 0.289   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   3918 Brel (1988 PE1)          Discovered 1988-Aug-13 by Elst, E. W. and Sause, G. at Haute Provence Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1988 PE1 = 1931 VF1 = 1951 RX1 = 1968 UN3 = 1971 OK = 1978 TE4 = 1980 DQ4  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Mar-07 20:49 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin