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187975 (2001 QQ155)
Classification: Main-belt Asteroid          SPK-ID: 2187975
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .199082808100904 4.1369e-08  
a 2.39924121294199 9.4242e-09 au
q 1.921593534958079 9.764e-08 au
i 3.267736456362823 4.3588e-06 deg
node 273.7480594693133 8.5028e-05 deg
peri 64.59360469379871 8.5942e-05 deg
M 70.13402527955756 1.3793e-05 deg
tp 2458936.054877599348
(2020-Mar-27.55487760)
5.1142e-05 TDB
period 1357.404536311183
3.72
7.9978e-06
2.19e-08
d
yr
n .2652120207129398 1.5626e-09 deg/d
Q 2.8768888909259 1.13e-08 au
  Orbit Determination Parameters
   # obs. used (total)      424  
   data-arc span      7145 days (19.56 yr)  
   first obs. used      2001-06-25  
   last obs. used      2021-01-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54626  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 11:57:43  

Additional Information
 Earth MOID = .913348 au 
 Jupiter MOID = 2.51827 au 
 T_jup = 3.497 
[ 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 16.6   n/a MPO436930  
rotation period rot_per 2.89 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:
[Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]

187975 (2001 QQ155)          Discovered 2001-Aug-23 by LONEOS at Anderson Mesa
Reference: 20080618/Numbers.arcLast Updated: 2008-06-20

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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