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 ]  
4261 Gekko (1989 BJ)
Classification: Main-belt Asteroid          SPK-ID: 2004261
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ hide orbit diagram ]

For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


[ revert to old Java-based viewer ]

Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1101621603288604 3.5667e-08  
a 2.793137388171926 1.0652e-08 au
q 2.485439339395596 9.9622e-08 au
i 2.661616233494394 3.3448e-06 deg
node 265.4671470805662 8.1646e-05 deg
peri 102.2055535730999 8.3084e-05 deg
M 359.3740037607625 1.4646e-05 deg
tp 2459003.464873016312
(2020-Jun-02.96487302)
6.9366e-05 TDB
period 1705.049038589455
4.67
9.754e-06
2.67e-08
d
yr
n .2111376223512134 1.2078e-09 deg/d
Q 3.100835436948257 1.1826e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2277  
   data-arc span      15392 days (42.14 yr)  
   first obs. used      1978-09-09  
   last obs. used      2020-10-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48021  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:53:04  

Additional Information
 Earth MOID = 1.48596 au 
 Jupiter MOID = 2.37354 au 
 T_jup = 3.318 
[ 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 13.0   n/a MPO448956  
diameter diameter 6.688 km 0.072 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.288   0.021 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
SMASSII spectral type spec_B Sq   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

4261 Gekko (1989 BJ)          Discovered 1989-Jan-28 by Oshima, Y. at Gekko
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1989 BJ = 1978 RR16 = 1978 VN = 1980 BV2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Nov-25 09:23 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin