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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08918841436320518 4.4581e-08  
a 2.285426195053337 1.2984e-08 AU
q 2.081592656572397 9.9312e-08 AU
i 3.724719372751669 6.0436e-06 deg
node 271.1083627466764 8.5594e-05 deg
peri 157.2564269069279 9.736e-05 deg
M 148.2819734705946 4.6169e-05 deg
tp 2456480.701424757666
(2013-Jul-07.20142476)
0.00016071 JED
period 1261.970573411264
3.46
1.0755e-05
2.945e-08
d
yr
n .2852681414170182 2.4311e-09 deg/d
Q 2.489259733534277 1.4142e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1192  
   data-arc span      8370 days (22.92 yr)  
   first obs. used      1991-07-08  
   last obs. used      2014-06-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .4996  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Mar-09 14:17:12  

Additional Information
 Earth MOID = 1.09592 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-May); 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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