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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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2720804217603616 3.2748e-08  
a 2.328059423181132 7.5021e-09 au
q 1.694640033438825 7.5179e-08 au
i 10.77455896792106 3.6299e-06 deg
node 139.1111773731427 1.652e-05 deg
peri 181.3323252980682 1.8112e-05 deg
M 120.9567406697202 6.3343e-06 deg
tp 2458564.569662335572
(2019-Mar-22.06966234)
2.1973e-05 TDB
period 1297.446679616761
3.55
6.2715e-06
1.717e-08
d
yr
n .2774680498672489 1.3412e-09 deg/d
Q 2.961478812923438 9.5433e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1141  
   data-arc span      8306 days (22.74 yr)  
   first obs. used      1997-04-30  
   last obs. used      2020-01-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52214  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 18:40:25  

Additional Information
 Earth MOID = .681823 au 
 Jupiter MOID = 2.37346 au 
 T_jup = 3.500 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457389.5 (2016-Jan-02.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2727557774861248 3.2634e-08  
q 1.692574445530784 7.4912e-08 au
tp 2457268.101505371017
(2015-Sep-02.60150537)
2.0439e-05 TDB
node 139.1652345249823 1.6518e-05 deg
peri 181.3837488002696 1.8102e-05 deg
i 10.7770752397888 3.6305e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1141  
   data-arc span      8306 days (22.74 yr)  
   first obs. used      1997-04-30  
   last obs. used      2020-01-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52214  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 18:40:25  

Additional Information
 Jupiter MOID = 2.37346 au 
 T_jup = 3.500 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.064994249756405E-15 -2.438560522141761E-15 -2.128841190336344E-13 1.503486831851891E-15 -9.164592910674376E-14 -1.047479780311781E-15
q -2.438560522141761E-15 5.611758483759315E-15 5.042668052061229E-13 -3.297913988141344E-15 2.154681180835447E-13 2.193184423986259E-15
tp -2.128841190336344E-13 5.042668052061229E-13 4.177337413790651E-10 -2.187655946600502E-12 1.579342020649839E-10 -1.180748794188791E-12
node 1.503486831851891E-15 -3.297913988141344E-15 -2.187655946600502E-12 2.728438364733654E-10 -2.681178428343193E-10 -5.588472550407909E-12
peri -9.164592910674376E-14 2.154681180835447E-13 1.579342020649839E-10 -2.681178428343193E-10 3.276692754132506E-10 5.079774513433568E-12
i -1.047479780311781E-15 2.193184423986259E-15 -1.180748794188791E-12 -5.588472550407909E-12 5.079774513433568E-12 1.318080104840421E-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

[ 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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