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4451 Grieve (1988 JJ)
Classification: Mars-crossing Asteroid          SPK-ID: 2004451
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbit Diagram
Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using 2-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet has stopped working because of a recent Java upgrade, here is a possible workaround.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).


Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3856227369047261 8.2234e-08  
a 2.603083596868144 2.7068e-08 AU
q 1.599275375852052 2.2409e-07 AU
i 27.7569881652919 1.0749e-05 deg
node 219.5386429925732 1.5049e-05 deg
peri 109.9658053025655 2.153e-05 deg
M 20.20680928994021 1.9282e-05 deg
tp 2456714.395501420527
(2014-Feb-25.89550142)
8.1033e-05 JED
period 1534.018510485088
4.20
2.3927e-05
6.551e-08
d
yr
n .2346777418521244 3.6604e-09 deg/d
Q 3.606891817884236 3.7506e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      628  
   data-arc span      21614 days (59.18 yr)  
   first obs. used      1954-05-24  
   last obs. used      2013-07-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5445  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Aug-26 18:38:40  

Additional Information
 Earth MOID = .765248 AU 
 T_jup = 3.154 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.1 mag n/a MPO267725  
rotation period rot_per 6.864 h n/a Asteroid Lightcurve DataBase (Rev. 2013-Sep-12) Published Reference List:
[Sheridan, E.E. (2002) Minor Planet Bul. 29, 32-33.]
[Stephens, R.D. (2002) Minor Planet Bul. 29, 34.]
[Behrend, R. (2009) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
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 (675)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1988 JJ = 1971 GF = 1980 VE1 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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