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19486 (1998 HW122)
Classification: Main-belt Asteroid          SPK-ID: 2019486
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04552568858354685 3.8718e-08  
a 2.76386098341019 1.3362e-08 au
q 2.638034308991242 1.1039e-07 au
i 9.603688479473188 4.0317e-06 deg
node 89.7109520316418 2.6022e-05 deg
peri 35.74834948391377 6.141e-05 deg
M 21.6795477910354 5.3223e-05 deg
tp 2458899.430425370895
(2020-Feb-19.93042537)
0.00024824 TDB
period 1678.312076302769
4.59
1.2171e-05
3.332e-08
d
yr
n .2145012272050504 1.5555e-09 deg/d
Q 2.889687657829138 1.397e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1902  
   data-arc span      13641 days (37.35 yr)  
   first obs. used      1982-12-23  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45504  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 05:01:50  

Additional Information
 Earth MOID = 1.66015 au 
 Jupiter MOID = 2.18827 au 
 T_jup = 3.318 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457058.5 (2015-Feb-05.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04523671064442233 3.9329e-08  
q 2.638346086626561 1.122e-07 au
tp 2457232.076181635704
(2015-Jul-28.57618164)
0.0002488 TDB
node 89.80586184447712 2.6007e-05 deg
peri 38.10228855271955 6.1069e-05 deg
i 9.606899503528203 4.0332e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1902  
   data-arc span      13641 days (37.35 yr)  
   first obs. used      1982-12-23  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45504  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 05:01:50  

Additional Information
 Jupiter MOID = 2.18827 au 
 T_jup = 3.318 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.54675164165739E-15 -4.385295248905491E-15 2.061546031640576E-12 8.054670981538606E-15 4.687566414105725E-13 -1.154413522862221E-15
q -4.385295248905491E-15 1.258807133265587E-14 -6.39917531795993E-12 -2.381551193326202E-14 -1.45356327538185E-12 3.750503716489148E-15
tp 2.061546031640576E-12 -6.39917531795993E-12 6.190322308620719E-8 3.50153387729492E-12 1.377119775558927E-8 -2.08461896317953E-12
node 8.054670981538606E-15 -2.381551193326202E-14 3.50153387729492E-12 6.763759317514093E-10 -6.655887839477692E-10 4.183401092431672E-12
peri 4.687566414105725E-13 -1.45356327538185E-12 1.377119775558927E-8 -6.655887839477692E-10 3.72943483030831E-9 -4.608005218222407E-12
i -1.154413522862221E-15 3.750503716489148E-15 -2.08461896317953E-12 4.183401092431672E-12 -4.608005218222407E-12 1.62669185555095E-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 13.3   n/a MPO384921  
diameter diameter 6.607 km 0.140 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.161   0.038 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19486 (1998 HW122)          Discovered 1998-Apr-23 by LINEAR at Socorro
Reference: 20001211/Numbers.arcLast Updated: 2004-04-19

[ 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
2060-Nov-23 06:59 00:01 Psych 0.0441020909170483 0.044096827894032 0.044107356666992 3.74164419049071 3.74164411716919 2473786.790787692 1.19131101767285 613.219588519313 44.625636197989 65.0115137450568 133941.134980409 T 27 CATAB v2.0f-lin.ifort 2020-May-20 05:02:02 2020-May-20 05:02

Alternate Designations
 1998 HW122 = 1982 YE4 = 2000 UB26 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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