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9182 (1991 NB4)
Classification: Main-belt Asteroid          SPK-ID: 2009182
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08894173260151267 4.4548e-08  
a 2.285922928810285 1.2982e-08 au
q 2.082608982928374 9.9245e-08 au
i 3.724146660752708 6.0358e-06 deg
node 271.1063013599696 8.5294e-05 deg
peri 157.2205582032473 9.7063e-05 deg
M 262.4033502106887 4.6451e-05 deg
tp 2457742.734046005557
(2016-Dec-20.23404601)
0.00016377 JED
period 1262.382026718848
3.46
1.0754e-05
2.944e-08
d
yr
n .2851751628116119 2.4293e-09 deg/d
Q 2.489236874692196 1.4137e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1195  
   data-arc span      8739 days (23.93 yr)  
   first obs. used      1991-07-08  
   last obs. used      2015-06-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49995  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 12:01:30  

Additional Information
 Earth MOID = 1.09648 au 
 Jupiter MOID = 2.72417 au 
 T_jup = 3.594 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.5 mag n/a MPO279612  
rotation period rot_per 5.416 h n/a LCDB (Rev. 2015-December); 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:
[Clark, M. (2015) Minor Planet Bul. 42, 15-20.]

9182 (1991 NB4)          Discovered 1991-Jul-08 by Debehogne, H. at La Silla
Reference: 19980910/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1991 NB4 = 1933 WG = 1992 YU 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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