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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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2444554877841151 4.1824e-08  
a 2.476586986792642 1.0268e-08 au
q 1.871171706896455 1.0274e-07 au
i 6.752928481887274 3.8445e-06 deg
node 147.7467593270268 2.9748e-05 deg
peri 223.048943784052 3.0267e-05 deg
M 256.8311456328828 6.6962e-06 deg
tp 2459804.466886389241
(2022-Aug-12.96688639)
2.812e-05 TDB
period 1423.569933010109
3.90
8.853e-06
2.424e-08
d
yr
n .2528853635162042 1.5727e-09 deg/d
Q 3.082002266688829 1.2778e-08 au
  Orbit Determination Parameters
   # obs. used (total)      680  
   data-arc span      7875 days (21.56 yr)  
   first obs. used      2000-01-07  
   last obs. used      2021-07-30  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51613  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 19:22:14  

Additional Information
 Earth MOID = .876125 au 
 Jupiter MOID = 2.39286 au 
 T_jup = 3.430 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457587.5 (2016-Jul-18.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .242818989232591 4.1723e-08  
q 1.877904445868082 1.0231e-07 au
tp 2456953.264883390392
(2014-Oct-22.76488339)
2.1183e-05 TDB
node 147.8244965010874 2.9686e-05 deg
peri 222.7060835251065 3.0222e-05 deg
i 6.755879905666375 3.847e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      680  
   data-arc span      7875 days (21.56 yr)  
   first obs. used      2000-01-07  
   last obs. used      2021-07-30  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51613  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 19:22:14  

Additional Information
 Jupiter MOID = 2.39286 au 
 T_jup = 3.430 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.740778393458649E-15 -4.256186583892457E-15 -5.118200768613804E-14 2.32691270314924E-14 -5.37560666463722E-15 -2.53115438055914E-15
q -4.256186583892457E-15 1.046676397016676E-14 1.365661785624458E-13 -5.536514423848818E-14 2.074924214712079E-14 6.483527955020051E-15
tp -5.118200768613804E-14 1.365661785624458E-13 4.487014580225424E-10 9.423232347471476E-13 1.321294424424131E-10 8.773980244972398E-13
node 2.32691270314924E-14 -5.536514423848818E-14 9.423232347471476E-13 8.812313290332479E-10 -8.740446796072883E-10 4.419840128885478E-11
peri -5.37560666463722E-15 2.074924214712079E-14 1.321294424424131E-10 -8.740446796072883E-10 9.133939793273603E-10 -4.368370756700099E-11
i -2.53115438055914E-15 6.483527955020051E-15 8.773980244972398E-13 4.419840128885478E-11 -4.368370756700099E-11 1.479919543083608E-11

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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