+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   4451 Grieve (1988 JJ) Classification: Mars-crossing Asteroid          SPK-ID: 2004451 [ 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 36 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3838129790580839 3.7802e-08   a 2.604196376839754 1.1555e-08 au q 1.604672007392619 9.5099e-08 au i 27.7996546437123 5.3837e-06 deg node 219.3452991147104 8.8645e-06 deg peri 110.272722925194 1.2134e-05 deg M 222.6899015044571 1.1972e-05 deg tp 2459785.975869561047 (2022-Jul-25.47586956) 5.4126e-05 TDB period 1535.002271146273 4.20 1.0216e-05 2.797e-08 d yr n .2345273402958341 1.5609e-09 deg/d Q 3.603720746286887 1.599e-08 au   Orbit Determination Parameters    # obs. used (total)      1941      data-arc span      24349 days (66.66 yr)      first obs. used      1954-05-24      last obs. used      2021-01-21      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .37154      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 01:17:59   Additional Information  Earth MOID = .769152 au   Jupiter MOID = 2.53739 au   T_jup = 3.154  [ hide covariance matrix ] Orbital Elements at Epoch 2457100.5 (2015-Mar-19.0) TDB Reference: JPL 36 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3854702798245513 3.8026e-08   q 1.599767250004121 9.576e-08 au tp 2456714.382379147686 (2014-Feb-25.88237915) 3.8933e-05 TDB node 219.5324150727073 8.8847e-06 deg peri 109.9925479641649 1.2059e-05 deg i 27.75429797825885 5.3831e-06 deg   Orbit Determination Parameters    # obs. used (total)      1941      data-arc span      24349 days (66.66 yr)      first obs. used      1954-05-24      last obs. used      2021-01-21      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .37154      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 01:17:59   Additional Information  Jupiter MOID = 2.53739 au   T_jup = 3.154  Orbit Covariance (6×6)   e q tp node peri i e 1.445948855420712E-15 -3.633741375674233E-15 6.526606124712653E-13 1.616782794034339E-15 1.147117732208894E-13 -4.70573805136088E-17 q -3.633741375674233E-15 9.169888396335623E-15 -1.531381625135835E-12 -2.691554500267321E-15 -2.653066880649964E-13 3.042200708134393E-16 tp 6.526606124712653E-13 -1.531381625135835E-12 1.515800347146875E-9 3.545581810800096E-12 3.314942383218573E-10 1.45072850865973E-12 node 1.616782794034339E-15 -2.691554500267321E-15 3.545581810800096E-12 7.893730685989419E-11 -6.870314935057644E-11 4.843088136660671E-12 peri 1.147117732208894E-13 -2.653066880649964E-13 3.314942383218573E-10 -6.870314935057644E-11 1.454220888273674E-10 -4.324301112035567E-12 i -4.70573805136088E-17 3.042200708134393E-16 1.45072850865973E-12 4.843088136660671E-12 -4.324301112035567E-12 2.897777761576378E-11 [ 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 12.11   n/a E2021B10   rotation period rot_per 6.864 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Sheridan, E.E. (2002) Minor Planet Bull. 29, 32-33.] [Stephens, R.D. (2002) Minor Planet Bull. 29, 34.] [Behrend, R. (2009) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Durech, J.; Hanus, J. (2018) Astron. Astrophys. 620, A91.] [Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.] SMASSII spectral type spec_B S   n/a Binzel et al. (2004) Icarus 170, 259-294   4451 Grieve (1988 JJ)          Discovered 1988-May-09 by Shoemaker, C. S. at Palomar Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1988 JJ = 1971 GF = 1980 VE1  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-05 11:31 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin