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389694 (2011 QD48)
Classification: Apollo [NEO, PHA]          SPK-ID: 2389694
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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 135 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4920248391185605 5.2973e-08  
a 1.545179496239939 8.805e-09 au
q .7849128031931846 8.5332e-08 au
i 19.0717376778078 1.2851e-05 deg
node 358.8004462444974 1.0071e-05 deg
peri 106.805636745874 1.1303e-05 deg
M 318.869477490768 1.122e-05 deg
tp 2459476.654619669749
(2021-Sep-19.15461967)
2.2504e-05 TDB
period 701.5632508590896
1.92
5.9967e-06
1.642e-08
d
yr
n .5131397626075296 4.3861e-09 deg/d
Q 2.305446189286694 1.3137e-08 au
  Orbit Determination Parameters
   # obs. used (total)      728  
   data-arc span      2940 days (8.05 yr)  
   first obs. used      2011-08-30  
   last obs. used      2019-09-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .34357  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 11:20:53  

Additional Information
 Earth MOID = .0191808 au 
 Jupiter MOID = 3.01641 au 
 T_jup = 4.264 
[ 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 18.1   n/a MPO349069  
diameter diameter 0.451 km 0.016 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
rotation period rot_per 5.24 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Warner, B.D. (2016) Minor Planet Bull. 43, 66-79.]
geometric albedo albedo 0.456   0.056 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  

389694 (2011 QD48)          Discovered 2011-Aug-30 by Siding Spring Survey at Siding Spring
Reference: Last Updated: 2014-03-21

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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