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19128 (1987 YR1)
Classification: Main-belt Asteroid          SPK-ID: 2019128
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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1887273719350981 3.0642e-08  
a 2.716041783846401 1.3825e-08 au
q 2.203450355915154 8.1327e-08 au
i 13.89804765422683 6.1906e-06 deg
node 226.4999545226399 1.5925e-05 deg
peri 245.322371389952 2.3737e-05 deg
M 115.6860701071946 1.6395e-05 deg
tp 2458675.110166653026
(2019-Jul-10.61016665)
7.4369e-05 TDB
period 1634.944810811306
4.48
1.2483e-05
3.418e-08
d
yr
n .2201909187511704 1.6812e-09 deg/d
Q 3.228633211777649 1.6434e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1159  
   data-arc span      11891 days (32.56 yr)  
   first obs. used      1987-12-17  
   last obs. used      2020-07-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46247  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:46:15  

Additional Information
 Earth MOID = 1.25965 au 
 Jupiter MOID = 2.13343 au 
 T_jup = 3.293 
[ 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 14.44   n/a E2021B10  
diameter diameter 3.549 km 0.221 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.321   0.068 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19128 (1987 YR1)          Discovered 1987-Dec-17 by Elst, E. W., Pizarro, G. at La Silla
Reference: 20001211/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1987 YR1 = 1998 KY23 = 2000 ST305 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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