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17171 (1999 NB38)
Classification: Jupiter Trojan          SPK-ID: 2017171
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08292936528618285 3.1204e-08  
a 5.135645845252991 9.1875e-08 au
q 4.709749994971538 1.883e-07 au
i 25.29397804794836 1.0699e-06 deg
node 318.00692511072 3.6522e-06 deg
peri 356.8057828729129 2.4241e-05 deg
M 297.3952464412026 3.0482e-05 deg
tp 2459939.757666428150
(2022-Dec-26.25766643)
0.00037286 TDB
period 4250.9992418417
11.64
0.00011407
3.123e-07
d
yr
n .08468597134918188 2.2725e-09 deg/d
Q 5.561541695534444 9.9494e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1605  
   data-arc span      24471 days (67.00 yr)  
   first obs. used      1953-08-11  
   last obs. used      2020-08-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47027  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:56:22  

Additional Information
 Earth MOID = 3.69449 au 
 Jupiter MOID = .219435 au 
 T_jup = 2.803 
[ 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 10.60   n/a E2021B10  
diameter diameter 40.946 km 0.561 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
rotation period rot_per 64.79 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:
[Stephens, R.D.; French, L.M.; Davitt, C.; Coley, D.R. (2014) Minor Planet Bull. 41, 95-100.]
geometric albedo albedo 0.080   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  

17171 (1999 NB38)          Discovered 1999-Jul-14 by LINEAR at Socorro
Reference: 20000913/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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