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6909 Levison (1991 BY2)
Classification: Mars-crossing Asteroid          SPK-ID: 2006909
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4670882702846603 5.9303e-08  
a 2.72302484759604 1.4376e-08 au
q 1.451131881590255 1.5846e-07 au
i 38.01619889380722 1.2535e-05 deg
node 308.2799303106033 9.9693e-06 deg
peri 75.52073530681086 1.8733e-05 deg
M 280.5088785474516 1.4224e-05 deg
tp 2459562.903143869827
(2021-Dec-14.40314387)
6.6627e-05 TDB
period 1641.254135168013
4.49
1.2997e-05
3.558e-08
d
yr
n .2193444587806917 1.737e-09 deg/d
Q 3.994917813601826 2.109e-08 au
  Orbit Determination Parameters
   # obs. used (total)      648  
   data-arc span      11675 days (31.96 yr)  
   first obs. used      1987-04-18  
   last obs. used      2019-04-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50447  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 19:12:58  

Additional Information
 Earth MOID = .712228 au 
 Jupiter MOID = 2.60751 au 
 T_jup = 2.919 
[ 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 13.8   n/a MPO435765  

6909 Levison (1991 BY2)          Discovered 1991-Jan-19 by Shoemaker, C. S. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1991 BY2 = 1994 OA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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