Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
JPL Small-Body Database Browser
Search: [ help ]  
4451 Grieve (1988 JJ)
Classification: Mars-crossing Asteroid          SPK-ID: 2004451
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ hide orbit diagram ]
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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3855482646050805 4.855e-08  
a 2.603050653419174 2.42e-08 AU
q 1.59944899131429 1.3061e-07 AU
i 27.75607251884767 8.6307e-06 deg
node 219.5373714992797 1.3235e-05 deg
peri 109.97565518736 2.0269e-05 deg
M 67.14380965083771 1.9707e-05 deg
tp 2456714.394745567151
8.0391e-05 JED
period 1533.989389810273
n .234682196885681 3.2727e-09 deg/d
Q 3.606652315524058 3.353e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      753  
   data-arc span      22188 days (60.75 yr)  
   first obs. used      1954-05-24  
   last obs. used      2015-02-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .45941  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Mar-09 13:53:30  

Additional Information
 Earth MOID = .766487 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 12.0 mag n/a MPO313455  
rotation period rot_per 6.864 h n/a LCDB (Rev. 2015-Feb); Warner et al., 2009 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,]
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.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 ]
FirstGov 2015-Mar-27 13:13 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin