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JPL Small-Body Database Browser
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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08269084829604625 6.6582e-08  
a 5.135911995898572 9.9697e-08 au
q 4.711219076183879 3.732e-07 au
i 25.29394880801706 7.2276e-06 deg
node 318.0068382116374 1.0777e-05 deg
peri 356.7134632481378 3.6329e-05 deg
M 280.5214399440251 3.9976e-05 deg
tp 2459939.082119762692
(2022-Dec-25.58211976)
0.00048746 TDB
period 4251.329702961418
11.64
0.00012379
3.389e-07
d
yr
n .08467938860381234 2.4657e-09 deg/d
Q 5.560604915613265 1.0794e-07 au
  Orbit Determination Parameters
   # obs. used (total)      1471  
   data-arc span      24275 days (66.46 yr)  
   first obs. used      1953-08-11  
   last obs. used      2020-01-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47306  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 21:58:05  

Additional Information
 Earth MOID = 3.69795 au 
 Jupiter MOID = .218716 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 10.5   n/a MPO435859  
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. 2019-August); 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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