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JPL Small-Body Database Browser
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19166 (1991 EY1)
Classification: Main-belt Asteroid          SPK-ID: 2019166
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1388459814660622 3.3361e-08  
a 2.311694268769401 8.8428e-09 au
q 1.990724809172642 7.8538e-08 au
i 5.052064178902389 4.5301e-06 deg
node 318.1237062842909 3.8645e-05 deg
peri 246.1097859833182 4.1957e-05 deg
M 75.68798009122361 1.6064e-05 deg
tp 2458730.590335249604
(2019-Sep-04.09033525)
5.7183e-05 TDB
period 1283.790097093758
3.51
7.3662e-06
2.017e-08
d
yr
n .2804196736016015 1.609e-09 deg/d
Q 2.632663728366159 1.0071e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1595  
   data-arc span      10306 days (28.22 yr)  
   first obs. used      1991-02-22  
   last obs. used      2019-05-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47105  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:40:46  

Additional Information
 Earth MOID = .993782 au 
 Jupiter MOID = 2.35261 au 
 T_jup = 3.566 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456638.5 (2013-Dec-12.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1388156982003294 3.3297e-08  
q 1.989998893548473 7.829e-08 au
tp 2456164.139547508342
(2012-Aug-24.63954751)
5.821e-05 TDB
node 318.169379906157 3.8647e-05 deg
peri 246.0274721941625 4.1972e-05 deg
i 5.052856536332184 4.53e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1595  
   data-arc span      10306 days (28.22 yr)  
   first obs. used      1991-02-22  
   last obs. used      2019-05-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47105  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:40:46  

Additional Information
 Jupiter MOID = 2.35261 au 
 T_jup = 3.566 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.108676734468164E-15 -2.594865538543114E-15 -2.898409939453631E-13 -2.448200245862048E-15 -4.747788340634378E-14 -3.7056860574293E-16
q -2.594865538543114E-15 6.12937868436308E-15 5.829269444133056E-13 5.411819890109049E-15 8.956475692123361E-14 1.029026074579741E-15
tp -2.898409939453631E-13 5.829269444133056E-13 3.388399145760861E-9 7.882814210231131E-12 9.581533183442185E-10 -4.995233565601499E-13
node -2.448200245862048E-15 5.411819890109049E-15 7.882814210231131E-12 1.493619490599847E-9 -1.485212741054159E-9 3.418483229850199E-12
peri -4.747788340634378E-14 8.956475692123361E-14 9.581533183442185E-10 -1.485212741054159E-9 1.761685251147273E-9 -3.500347303586392E-12
i -3.7056860574293E-16 1.029026074579741E-15 -4.995233565601499E-13 3.418483229850199E-12 -3.500347303586392E-12 2.052084426435519E-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 14.7   n/a MPO365482  
diameter diameter 2.908 km 0.444 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.302   0.099 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19166 (1991 EY1)          Discovered 1991-Mar-07 by Debehogne, H. at La Silla
Reference: 20001211/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1991 EY1 = 1991 DJ2 = 1998 BA25 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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