Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
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 | 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 126 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3602157305285911 2.7868e-09  
a 1.488887293120463 1.4144e-09 au
q .9525666691543391 4.0067e-09 au
i 1.432077462712338 2.4895e-06 deg
node 314.4053379873167 2.9568e-05 deg
peri 158.0857884367074 3.0702e-05 deg
M 150.4477426721708 5.9391e-06 deg
tp 2458923.184376798321
(2020-Mar-14.68437680)
1.0556e-05 TDB
period 663.5767514979888
1.82
9.4555e-07
2.589e-09
d
yr
n .542514485607459 7.7305e-10 deg/d
Q 2.025207917086588 1.9239e-09 au
  Orbit Determination Parameters
   # obs. used (total)      717  
   # delay obs. used      16  
   # Doppler obs. used      16  
   data-arc span      14067 days (38.51 yr)  
   first obs. used      1981-09-30  
   last obs. used      2020-04-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47065  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 16:36:42  

Additional Information
 Earth MOID = .00332612 au 
 Jupiter MOID = 3.09599 au 
 T_jup = 4.493 
[ show covariance matrix ]

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 18.31   n/a E2021B10  
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 LCDB (Rev. 2020-October); Warner et al., 2009 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, #1758.]
[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
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-15 09:10 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin