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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2721933000322811 3.1779e-08  
a 2.327904642359831 7.4542e-09 au
q 1.694264595595441 7.3055e-08 au
i 10.77561738467145 3.6121e-06 deg
node 139.1100878477465 1.5601e-05 deg
peri 181.3823307782943 1.69e-05 deg
M 230.7554250765738 6.3013e-06 deg
tp 2459862.253393872154
(2022-Oct-09.75339387)
2.4063e-05 TDB
period 1297.317290828771
3.55
6.2312e-06
1.706e-08
d
yr
n .277495723324569 1.3329e-09 deg/d
Q 2.96154468912422 9.4832e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1232  
   data-arc span      8745 days (23.94 yr)  
   first obs. used      1997-04-30  
   last obs. used      2021-04-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51719  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 23:08:32  

Additional Information
 Earth MOID = .680775 au 
 Jupiter MOID = 2.3732 au 
 T_jup = 3.500 
[ 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 15.30   n/a MPCxxxxx  
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

Alternate Designations
 1997 HQ2 = 2001 QK31 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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