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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2720804260746542 3.2687e-08  
a 2.328059423667986 7.496e-09 au
q 1.694640023749286 7.5045e-08 au
i 10.77455876269901 3.6267e-06 deg
node 139.1111756943722 1.6442e-05 deg
peri 181.3323247248373 1.8007e-05 deg
M 120.9567419447432 6.3043e-06 deg
tp 2458564.569657603620
(2019-Mar-22.06965760)
2.1853e-05 TDB
period 1297.446680023753
3.55
6.2664e-06
1.716e-08
d
yr
n .2774680497802109 1.3401e-09 deg/d
Q 2.961478823586686 9.5356e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1148  
   data-arc span      8574 days (23.47 yr)  
   first obs. used      1997-04-30  
   last obs. used      2020-10-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5234  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:23:24  

Additional Information
 Earth MOID = .681823 au 
 Jupiter MOID = 2.37346 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 15.3   n/a MPO502634  
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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