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176641 (2002 NQ9)
Classification: Main-belt Asteroid          SPK-ID: 2176641
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2444555043322588 4.3811e-08  
a 2.476586989318092 1.0536e-08 au
q 1.871171667821627 1.0718e-07 au
i 6.752927029386807 4.1376e-06 deg
node 147.7467543405293 3.0279e-05 deg
peri 223.0489465075933 3.083e-05 deg
M 256.8311462654137 6.7018e-06 deg
tp 2459804.466884512010
(2022-Aug-12.96688451)
2.8122e-05 TDB
period 1423.569935187595
3.90
9.0847e-06
2.487e-08
d
yr
n .2528853631293921 1.6138e-09 deg/d
Q 3.082002310814556 1.3112e-08 au
  Orbit Determination Parameters
   # obs. used (total)      665  
   data-arc span      7826 days (21.43 yr)  
   first obs. used      2000-01-07  
   last obs. used      2021-06-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52191  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 09:29:54  

Additional Information
 Earth MOID = .876125 au 
 Jupiter MOID = 2.39286 au 
 T_jup = 3.430 
[ 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 16.21   n/a E2021B55  
rotation period rot_per 11.48 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]

176641 (2002 NQ9)          Discovered 2002-Jul-03 by NEAT at Palomar
Reference: 20080221/Numbers.arcLast Updated: 2008-02-22
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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