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3681 Boyan (1974 QO2)
Classification: Main-belt Asteroid          SPK-ID: 2003681
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1844943693645857 2.0297e-08  
a 2.229941650605673 6.143e-09 au
q 1.818529972057356 4.6559e-08 au
i 4.065423231016535 3.421e-07 deg
node 132.9813127727806 2.9398e-06 deg
peri 172.5423954569127 3.9478e-06 deg
M 352.4765166451167 5.2409e-06 deg
tp 2459225.918805589286
(2021-Jan-11.41880559)
1.7761e-05 TDB
period 1216.294312155739
3.33
5.0259e-06
1.376e-08
d
yr
n .2959809944041769 1.223e-09 deg/d
Q 2.641353329153989 7.2763e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2588  
   data-arc span      26754 days (73.25 yr)  
   first obs. used      1947-06-14  
   last obs. used      2020-09-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45566  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 15:25:16  

Additional Information
 Earth MOID = .801604 au 
 Jupiter MOID = 2.59703 au 
 T_jup = 3.617 
[ 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 13.47   n/a E2021B10  
diameter diameter 4.575 km 0.045 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.324   0.022 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

3681 Boyan (1974 QO2)          Discovered 1974-Aug-27 by Chernykh, L. at Nauchnyj
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1974 QO2 = 1937 KA = 1947 LG = 1980 GM1 = 1984 SN2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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