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26231 (1998 QQ7)
Classification: Main-belt Asteroid          SPK-ID: 2026231
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1470587386925685 3.8571e-08  
a 2.172192604257716 8.2641e-09 au
q 1.85275269967825 8.036e-08 au
i 3.344971463121455 3.7801e-06 deg
node 349.178555312628 6.1133e-05 deg
peri 263.5046752138705 6.2825e-05 deg
M 214.7859055268246 1.5545e-05 deg
tp 2459072.185138643987
(2020-Aug-10.68513864)
5.178e-05 TDB
period 1169.353777454452
3.20
6.6732e-06
1.827e-08
d
yr
n .3078623483678979 1.7569e-09 deg/d
Q 2.491632508837181 9.4794e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1279  
   data-arc span      10239 days (28.03 yr)  
   first obs. used      1991-03-13  
   last obs. used      2019-03-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5195  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 00:56:43  

Additional Information
 Earth MOID = .841797 au 
 Jupiter MOID = 2.55235 au 
 T_jup = 3.671 
[ 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 14.7   n/a MPO416972  
diameter diameter 2.801 km 0.207 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 2.969 h n/a LCDB (Rev. 2019-January); 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.]
geometric albedo albedo 0.357   0.129 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

26231 (1998 QQ7)          Discovered 1998-Aug-17 by LINEAR at Socorro
Reference: 20010705/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 QQ7 = 1999 XJ170 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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