Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
85182 (1991 AQ)
Classification: Apollo [NEO, PHA]          SPK-ID: 2085182
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ hide orbit diagram ]

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.


[ revert to old Java-based viewer ]

Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 87 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .7764382630418125 1.7378e-08  
a 2.222167326790404 6.2317e-09 au
q .4967915873889949 3.7388e-08 au
i 3.125425837033594 6.0078e-06 deg
node 339.6042950064706 8.2775e-05 deg
peri 243.048587366216 8.2196e-05 deg
M 302.8957111001188 1.2916e-05 deg
tp 2459192.424222753724
(2020-Dec-08.92422275)
4.4193e-05 TDB
period 1209.93924488716
3.31
5.0896e-06
1.393e-08
d
yr
n .2975356006685889 1.2516e-09 deg/d
Q 3.947543066191813 1.107e-08 au
  Orbit Determination Parameters
   # obs. used (total)      364  
   # delay obs. used      5  
   # Doppler obs. used      3  
   data-arc span      10867 days (29.75 yr)  
   first obs. used      1991-01-14  
   last obs. used      2020-10-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61945  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-16 08:07:53  

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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Oct-22 02:20 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin