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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 89 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .7764382424232167 1.6965e-08  
a 2.222167319363614 5.9012e-09 au
q .4967916315466187 3.6546e-08 au
i 3.12542516092733 6.0184e-06 deg
node 339.6043061112984 8.3149e-05 deg
peri 243.0485706265853 8.2584e-05 deg
M 302.8957254072068 1.2134e-05 deg
tp 2459192.424173706270
(2020-Dec-08.92417371)
4.1519e-05 TDB
period 1209.939238821484
3.31
4.8197e-06
1.32e-08
d
yr
n .2975356021601965 1.1852e-09 deg/d
Q 3.947543007180609 1.0483e-08 au
  Orbit Determination Parameters
   # obs. used (total)      372  
   # delay obs. used      5  
   # Doppler obs. used      3  
   data-arc span      10875 days (29.77 yr)  
   first obs. used      1991-01-14  
   last obs. used      2020-10-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61081  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-26 06:55:02  

Additional Information
 Earth MOID = .0165496 au 
 Jupiter MOID = 1.0798 au 
 T_jup = 3.164 
[ 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

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