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79400 (1997 HQ2)
Classification: Main-belt Asteroid          SPK-ID: 2079400
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2721171402761525 3.1821e-08  
a 2.328126971518944 7.4433e-09 au
q 1.694603717829429 7.3167e-08 au
i 10.77522842449452 3.6134e-06 deg
node 139.1097083724068 1.5635e-05 deg
peri 181.3573605464519 1.6944e-05 deg
M 176.408737555405 6.1655e-06 deg
tp 2458564.691965849904
(2019-Mar-22.19196585)
2.0715e-05 TDB
period 1297.503147893376
3.55
6.2224e-06
1.704e-08
d
yr
n .2774559742567834 1.3306e-09 deg/d
Q 2.961650225208459 9.4687e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1225  
   data-arc span      8720 days (23.87 yr)  
   first obs. used      1997-04-30  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51733  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 13:41:41  

Additional Information
 Earth MOID = .679818 au 
 Jupiter MOID = 2.37344 au 
 T_jup = 3.500 
[ 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 15.29   n/a E2021B10  
diameter diameter 2.382 km 0.559 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
geometric albedo albedo 0.248   0.109 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  

79400 (1997 HQ2)          Discovered 1997-Apr-30 by Spacewatch at Kitt Peak
Reference: 20040504/Numbers.arcLast Updated: 2004-07-16

[ show close-approach data ]
Alternate Designations
 1997 HQ2 = 2001 QK31 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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