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19459 (1998 HM11)
Classification: Main-belt Asteroid          SPK-ID: 2019459
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1702644948690075 1.1771e-08  
a 2.286417058219033 6.2275e-09 au
q 1.897121412741487 2.6748e-08 au
i 7.872172016252001 9.0666e-07 deg
node 107.024705657019 3.9465e-06 deg
peri 89.67925852655513 6.0994e-06 deg
M 212.753477280524 5.1887e-06 deg
tp 2459717.004549260454
(2022-May-17.50454926)
1.9525e-05 TDB
period 1262.791367155113
3.46
5.1592e-06
1.413e-08
d
yr
n .2850827217888162 1.1647e-09 deg/d
Q 2.675712703696579 7.2878e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1769  
   data-arc span      32509 days (89.00 yr)  
   first obs. used      1932-03-05  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48694  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:54:19  

Additional Information
 Earth MOID = .91451 au 
 Jupiter MOID = 2.31616 au 
 T_jup = 3.570 
[ 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 14.36   n/a E2021B10  
diameter diameter 4.058 km 0.988 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
geometric albedo albedo 0.223   0.121 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  

19459 (1998 HM11)          Discovered 1998-Apr-18 by Spacewatch at Kitt Peak
Reference: 20001211/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 HM11 = 1932 EH = 1991 DF2 = 1991 GJ12 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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