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22318 (1991 PG1)
Classification: Main-belt Asteroid          SPK-ID: 2022318
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .273098853547746 4.1705e-08  
a 2.429497474954744 1.3718e-08 au
q 1.76600449984746 9.8364e-08 au
i 12.42226585165041 3.9941e-06 deg
node 127.4645944411367 1.9841e-05 deg
peri 194.6223768594892 2.2231e-05 deg
M 270.1953118297291 1.477e-05 deg
tp 2459545.540133632786
(2021-Nov-27.04013363)
5.8779e-05 TDB
period 1383.162178262795
3.79
1.1715e-05
3.207e-08
d
yr
n .2602731665582035 2.2044e-09 deg/d
Q 3.092990450062028 1.7464e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1206  
   data-arc span      10814 days (29.61 yr)  
   first obs. used      1991-08-06  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53283  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:04:24  

Additional Information
 Earth MOID = .753673 au 
 Jupiter MOID = 2.24352 au 
 T_jup = 3.426 
[ 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 14.95   n/a E2021B10  
diameter diameter 5.019 km 0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.099   0.001 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

22318 (1991 PG1)          Discovered 1991-Aug-15 by Helin, E. F. at Palomar
Reference: 20010309/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1991 PG1 = 1998 HZ108 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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