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21445 Pegconnolly (1998 HG17)
Classification: Main-belt Asteroid          SPK-ID: 2021445
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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1935216000512232 2.9239e-08  
a 2.282108819192616 6.322e-09 au
q 1.840471469011453 6.8906e-08 au
i 5.525657466874389 3.0345e-06 deg
node 216.8879900709287 3.3615e-05 deg
peri 176.8081113270678 3.4637e-05 deg
M 38.8815401825816 8.7754e-06 deg
tp 2459260.498433720392
(2021-Feb-14.99843372)
3.0533e-05 TDB
period 1259.223879268869
3.45
5.2325e-06
1.433e-08
d
yr
n .2858903852816255 1.188e-09 deg/d
Q 2.723746169373778 7.5455e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2080  
   data-arc span      23822 days (65.22 yr)  
   first obs. used      1955-11-24  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48831  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 15:00:17  

Additional Information
 Earth MOID = .846231 au 
 Jupiter MOID = 2.70851 au 
 T_jup = 3.574 
[ 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 14.62   n/a E2021B10  
diameter diameter 3.127 km 0.053 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.301   0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21445 Pegconnolly           Discovered 1998 Apr. 18 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Peggy Connolly mentored a finalist in the 2005 Intel Science Talent Search, a science competition for high school seniors. She teaches at the Illinois Mathematics and Science Academy, Aurora, Illinois.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050224/MPCPages.arcLast Updated: 2005-02-28

Alternate Designations
 1998 HG17 = 2000 VP36 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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