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6991 Chichibu (1995 AX)
Classification: Main-belt Asteroid          SPK-ID: 2006991
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2029305943192643 1.7505e-08  
a 2.401923622553501 7.6357e-09 au
q 1.914499834319239 4.354e-08 au
i 5.761703797727934 4.8765e-07 deg
node 131.5505774746611 6.2647e-06 deg
peri 229.1763359523213 7.6121e-06 deg
M 91.03445008542603 5.8834e-06 deg
tp 2458856.672595140452
(2020-Jan-08.17259514)
2.1576e-05 TDB
period 1359.68158903893
3.72
6.4836e-06
1.775e-08
d
yr
n .2647678713179168 1.2625e-09 deg/d
Q 2.889347410787764 9.1852e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2673  
   data-arc span      23031 days (63.06 yr)  
   first obs. used      1958-02-22  
   last obs. used      2021-03-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45656  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 19:18:14  

Additional Information
 Earth MOID = .915084 au 
 Jupiter MOID = 2.56945 au 
 T_jup = 3.490 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.8   n/a MPO492833  
diameter diameter 4.464 km 0.863 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.808   0.163 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

6991 Chichibu           Discovered 1995 Jan. 6 by T. Kobayashi at Oizumi.
Chichibu is the name of the western part of the Saitama prefecture.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030106/MPCPages.arcLast Updated: 2003-10-02

Alternate Designations
 1995 AX = 1941 QB = 1958 DB = 1965 AS = 1985 KZ 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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