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26230 (1998 QR1)
Classification: Main-belt Asteroid          SPK-ID: 2026230
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.


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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 .0887793156150411 4.4728e-08  
a 2.455692363455305 9.6245e-09 au
q 2.23767767606666 1.0693e-07 au
i 5.504018146071997 3.3386e-06 deg
node 260.7098417995134 4.0525e-05 deg
peri 291.731076319519 4.4526e-05 deg
M 25.3741910437771 1.6926e-05 deg
tp 2458901.428424150235
(2020-Feb-21.92842415)
6.6167e-05 TDB
period 1405.592290386036
3.85
8.2633e-06
2.262e-08
d
yr
n .2561197884068706 1.5057e-09 deg/d
Q 2.67370705084395 1.0479e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1881  
   data-arc span      9008 days (24.66 yr)  
   first obs. used      1995-12-24  
   last obs. used      2020-08-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49304  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:30:07  

Additional Information
 Earth MOID = 1.2435 au 
 Jupiter MOID = 2.31637 au 
 T_jup = 3.481 
[ 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 14.6   n/a MPO431804  
rotation period rot_per 7.318 h n/a LCDB (Rev. 2019-August); 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

26230 (1998 QR1)          Discovered 1998-Aug-19 by Pravec, P. at Ondrejov
Reference: 20010705/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1998 QR1 = 1995 YZ25 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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