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181745 (1995 YY18)
Classification: Main-belt Asteroid          SPK-ID: 2181745
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09412800083075271 4.0271e-08  
a 2.389206314895009 1.3502e-08 au
q 2.164315100901732 9.4935e-08 au
i 7.397405028912304 4.0388e-06 deg
node 112.0892564177398 3.6141e-05 deg
peri 208.3605413630627 4.3223e-05 deg
M 123.1160813956402 2.3618e-05 deg
tp 2458935.191782333629
(2020-Mar-26.69178233)
8.8346e-05 TDB
period 1348.897369680047
3.69
1.1435e-05
3.131e-08
d
yr
n .2668846482259732 2.2624e-09 deg/d
Q 2.614097528888286 1.4773e-08 au
  Orbit Determination Parameters
   # obs. used (total)      413  
   data-arc span      9153 days (25.06 yr)  
   first obs. used      1995-12-22  
   last obs. used      2021-01-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57781  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 02:38:37  

Additional Information
 Earth MOID = 1.15324 au 
 Jupiter MOID = 2.61839 au 
 T_jup = 3.516 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457719.5 (2016-Nov-27.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09466853928611822 4.0229e-08  
q 2.163158086023218 9.4972e-08 au
tp 2457588.164501913915
(2016-Jul-18.66450191)
8.8533e-05 TDB
node 112.1102849284229 3.6172e-05 deg
peri 208.8318420252323 4.3188e-05 deg
i 7.394534344033681 4.0368e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      413  
   data-arc span      9153 days (25.06 yr)  
   first obs. used      1995-12-22  
   last obs. used      2021-01-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57781  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 02:38:37  

Additional Information
 Jupiter MOID = 2.61839 au 
 T_jup = 3.516 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.618408904031547E-15 -3.789432420862515E-15 8.763082359510568E-13 1.828806064501597E-14 2.132280643686283E-13 -8.91019535929595E-16
q -3.789432420862515E-15 9.01959839888341E-15 -2.228099060411651E-12 -4.32067063229927E-14 -5.433540519878947E-13 2.364190326155044E-15
tp 8.763082359510568E-13 -2.228099060411651E-12 7.838012057104148E-9 2.829282396623305E-11 2.11131644849178E-9 -2.033636871536051E-14
node 1.828806064501597E-14 -4.32067063229927E-14 2.829282396623305E-11 1.308380756277032E-9 -1.289793355788204E-9 1.620280237269598E-11
peri 2.132280643686283E-13 -5.433540519878947E-13 2.11131644849178E-9 -1.289793355788204E-9 1.865227506131373E-9 -1.60759676073202E-11
i -8.91019535929595E-16 2.364190326155044E-15 -2.033636871536051E-14 1.620280237269598E-11 -1.60759676073202E-11 1.629583583745692E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.84   n/a MPCxxxxx  

181745 (1995 YY18)          Discovered 1995-Dec-22 by Spacewatch at Kitt Peak
Reference: 20080420/Numbers.arcLast Updated: 2008-04-23

Alternate Designations
 1995 YY18 = 2007 AM1 = 2007 DB5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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