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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 ]

[ show orbit diagram ]
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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457428.5 (2016-Feb-10.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2727525196193261 3.2576e-08  
q 1.692538613366484 7.4783e-08 au
tp 2457268.090969876745
(2015-Sep-02.59096988)		 2.0281e-05 TDB
node 139.1648453794149 1.644e-05 deg
peri 181.3783176640571 1.7997e-05 deg
i 10.77704498110548 3.6273e-06 deg
   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
 Jupiter MOID = 2.37346 au 
 T_jup = 3.500 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.061165067532907E-15 -2.429980270587085E-15 -2.086816125237763E-13 1.598706691210588E-15 -8.990668891475475E-14 -1.050284423486563E-15
q -2.429980270587085E-15 5.592506799931109E-15 4.950343298078238E-13 -3.521855913622841E-15 2.116655973802844E-13 2.198531354670678E-15
tp -2.086816125237763E-13 4.950343298078238E-13 4.113072471809441E-10 -2.140450464188943E-12 1.550018443547135E-10 -1.165278857223945E-12
node 1.598706691210588E-15 -3.521855913622841E-15 -2.140450464188943E-12 2.702838792580777E-10 -2.6559084925307E-10 -5.700950025402978E-12
peri -8.990668891475475E-14 2.116655973802844E-13 1.550018443547135E-10 -2.6559084925307E-10 3.238759861564192E-10 5.196663742632565E-12
i -1.050284423486563E-15 2.198531354670678E-15 -1.165278857223945E-12 -5.700950025402978E-12 5.196663742632565E-12 1.315750761377462E-11

[ 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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)		 Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1966-May-27 09:42 < 00:01 Juno 0.0493465474908087 0.0493425096229438 0.0493505864226763 7.54558532231974 7.54558528964619 2439272.904123281 0.280726119129876 422.404563691541 46.6937369071755 -62.1963085962398 140041.454857861 T 23 CATAB v2.0f-lin.ifort 2020-Nov-12 21:23:26 2020-Nov-12 21:23

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