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46561 (1991 RQ)
Classification: Main-belt Asteroid          SPK-ID: 2046561
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2731208441197961 4.3095e-08  
a 2.367937528730658 8.6864e-09 au
q 1.721204432060797 1.0491e-07 au
i 13.03668146979968 3.9318e-06 deg
node 151.8670313142689 1.8344e-05 deg
peri 187.3059740478503 1.9483e-05 deg
M 325.5122503152087 7.965e-06 deg
tp 2459128.001749721408
(2020-Oct-05.50174972)
2.9678e-05 TDB
period 1330.925627772937
3.64
7.3234e-06
2.005e-08
d
yr
n .2704884423950831 1.4884e-09 deg/d
Q 3.01467062540052 1.1059e-08 au
  Orbit Determination Parameters
   # obs. used (total)      933  
   data-arc span      10539 days (28.85 yr)  
   first obs. used      1991-08-07  
   last obs. used      2020-06-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5859  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 21:41:07  

Additional Information
 Earth MOID = .712747 au 
 Jupiter MOID = 2.38842 au 
 T_jup = 3.462 
[ 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 15.2   n/a MPO337630  
diameter diameter 4.710 km 1.082 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
geometric albedo albedo 0.069   0.050 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)  

46561 (1991 RQ)          Discovered 1991-Sep-07 by Helin, E. F. at Palomar
Reference: 20020921/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1991 RQ = 1991 PN16 = 2000 AA182 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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