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85182 (1991 AQ)
Classification: Apollo [NEO, PHA]          SPK-ID: 2085182
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 95 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .776526649791882 1.5706e-08  
a 2.222666064687859 1.9008e-09 au
q .4967066318696893 3.462e-08 au
i 3.122813238044089 5.6937e-06 deg
node 339.6071513932864 7.8895e-05 deg
peri 243.0211618675399 7.8365e-05 deg
M 60.69618814806806 1.1486e-05 deg
tp 2459192.434930414578
(2020-Dec-08.93493041)
3.8507e-05 TDB
period 1210.346601528558
3.31
1.5526e-06
4.251e-09
d
yr
n .2974354614995017 3.8154e-10 deg/d
Q 3.948625497506029 3.3768e-09 au
  Orbit Determination Parameters
   # obs. used (total)      391  
   # delay obs. used      5  
   # Doppler obs. used      3  
   data-arc span      11203 days (30.67 yr)  
   first obs. used      1991-01-14  
   last obs. used      2021-09-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .61574  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Sep-17 06:49:30  

Additional Information
 Earth MOID = .0165244 au 
 Jupiter MOID = 1.07643 au 
 T_jup = 3.163 
[ 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 17.1   n/a MPO186589  
diameter diameter 1.1 km n/a Hazards due to Comets and Asteroids (1994), Ed. T. Gehrels, pp.540-543 based on assumed medium albedo (0.15)
geometric albedo albedo 0.242   0.194 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  

85182 (1991 AQ)          Discovered 1991-Jan-14 by Helin, E. F. at Palomar
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

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Alternate Designations
 1991 AQ = 1994 RD 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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