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JPL Small-Body Database Browser
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18209 (4158 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2018209
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05632330482351667 4.4407e-08  
a 2.360489213085497 1.0481e-08 au
q 2.227538659604259 1.0492e-07 au
i 4.250536732708463 5.1279e-06 deg
node 333.8676826568723 5.282e-05 deg
peri 164.0163550671177 6.7118e-05 deg
M 34.39359312460674 4.4574e-05 deg
tp 2458873.945816680373
(2020-Jan-25.44581668)
0.00016359 TDB
period 1324.650955484798
3.63
8.8226e-06
2.415e-08
d
yr
n .2717697054528953 1.8101e-09 deg/d
Q 2.493439766566734 1.1071e-08 au
  Orbit Determination Parameters
   # obs. used (total)      979  
   data-arc span      21305 days (58.33 yr)  
   first obs. used      1960-09-24  
   last obs. used      2019-01-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53289  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 22:32:32  

Additional Information
 Earth MOID = 1.24094 au 
 Jupiter MOID = 2.50544 au 
 T_jup = 3.546 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.2   n/a MPO458991  

18209 (4158 P-L)          Discovered 1960-Sep-24 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2142-May-28 03:49 00:14 Amphi 0.00643639785727393 0.00643481474143498 0.00643799135705657 1.28044289133105 1.28044219378953 2503556.658733426 14.2453249440962 467.113884456795 37.2921405368707 -81.4330179808493 25405.312439496 T 19 CATAB v2.0e-lin.ifort 2019-Jul-12 22:32:44 2019-Jul-12 22:33
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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