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
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
4660 Nereus (1982 DB)
Classification: Apollo [NEO, PHA]          SPK-ID: 2004660
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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 96 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3600571992012329 3.1399e-09  
a 1.488604073513178 2.7981e-09 AU
q .9526214600844766 4.251e-09 AU
i 1.432003089237901 2.653e-06 deg
node 314.4590750053555 3.1162e-05 deg
peri 158.015675226729 3.2314e-05 deg
M 288.2117093709225 7.4178e-06 deg
tp 2456932.787358040201
(2014-Oct-02.28735804)
1.404e-05 JED
period 663.3874198305924
1.82
1.8704e-06
5.121e-09
d
yr
n .5426693199758481 1.5301e-09 deg/d
Q 2.024586686941879 3.8055e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      540  
   # delay obs. used      16  
   # Doppler obs. used      16  
   data-arc span      11571 days (31.68 yr)  
   first obs. used      1981-09-30  
   last obs. used      2013-06-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .46248  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 18:04:13  

Additional Information
 Earth MOID = .00319609 AU 
 T_jup = 4.493 
[ 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 18.2 mag n/a MPO263389  
diameter diameter 0.33 km n/a Delbo et al. (2003). Icarus, v. 166, pp. 116-130  
rotation period rot_per 15.1 h n/a Asteroid Lightcurve DataBase (Rev. 2013-Sep-12) Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Ishibashi, Y.; Abe, M.; Takagi, Y. (1998) Lunar and Planetary Sci. XVIX. CD-ROM, Houston: Lunar & Planetary Inst.]
[Ishibashi, Y.; Abe, M.; Takagi, Y. (2000) Adv. Space Res. 25, 277-280.]
[Brozovic, M.; Ostro, S.J.; Benner, L.A.M.; Giorgini, J.D.; et al. (2009) Icarus 201, 153-166.]
geometric albedo albedo 0.55   n/a Delbo et al. (2003). Icarus, v. 166, pp. 116-130  
SMASSII spectral type spec_B Xe   n/a Binzel et al. (2004) Planet. Space Sci. 52, 291-296  

4660 Nereus (1982 DB)          Discovered 1982-Feb-28 by Helin, E. F. at Palomar (675)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2014-Jul-23 18:19 UT
(server date/time)  
NASA Home Page
Site Manager:   Donald K. Yeomans
Webmaster  Alan B. Chamberlin