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186271 (2001 YU138)
Classification: Main-belt Asteroid          SPK-ID: 2186271
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03229950497901209 4.2866e-08  
a 2.881508924958938 2.1867e-08 au
q 2.788437613090159 1.256e-07 au
i 6.219816565202368 4.9534e-06 deg
node 76.45658199629197 4.213e-05 deg
peri 112.2207968732885 8.7155e-05 deg
M 282.9638150264763 7.7514e-05 deg
tp 2459778.814391919654
(2022-Jul-18.31439192)
0.00038584 TDB
period 1786.604322869545
4.89
2.0337e-05
5.568e-08
d
yr
n .2014995684225078 2.2937e-09 deg/d
Q 2.974580236827717 2.2573e-08 au
  Orbit Determination Parameters
   # obs. used (total)      235  
   data-arc span      8305 days (22.74 yr)  
   first obs. used      1998-04-22  
   last obs. used      2021-01-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .6302  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:50:35  

Additional Information
 Earth MOID = 1.79471 au 
 Jupiter MOID = 1.99829 au 
 T_jup = 3.285 
[ 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 16.76   n/a MPCxxxxx  

186271 (2001 YU138)          Discovered 2001-Dec-20 by Spacewatch at Kitt Peak
Reference: 20080520/Numbers.arcLast Updated: 2008-05-22

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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
1991-Dec-13 17:05 < 00:01 Inter 0.0482058878227289 0.0482024266872868 0.0482093494433613 7.61482778715288 7.61482774727257 2448604.212009797 0.667222070348527 308.887828120549 58.3454093768448 -57.6296068075677 105111.109858209 T 18 CATAB v2.0f-lin.ifort 2021-Apr-13 21:50:36 2021-Apr-13 21:50
2189-Oct-02 08:08 00:17 Iris 0.0240170641708354 0.0239644299346159 0.0240697011552786 4.69901442505583 4.69901437411731 2520850.838669818 17.2747742119576 2654.71002096957 66.0440572363137 8.7741408445106 8400.74531074113 T 18 CATAB v2.0f-lin.ifort 2021-Apr-13 21:50:36 2021-Apr-13 21:50

Alternate Designations
 2001 YU138 = 1998 HY15 = 2005 UK285 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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