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120749 (1997 WR12)
Classification: Main-belt Asteroid          SPK-ID: 2120749
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1028061614942719 6.1546e-08  
a 2.45572674875546 1.1202e-08 au
q 2.203262908037103 1.537e-07 au
i .9550083345395242 3.7503e-06 deg
node 267.520141674794 0.0003688 deg
peri 205.3436565703518 0.00037135 deg
M 299.8787527542792 4.099e-05 deg
tp 2459435.243712605036
(2021-Aug-08.74371260)
0.00016016 TDB
period 1405.621812741548
3.85
9.6174e-06
2.633e-08
d
yr
n .2561144091082722 1.7524e-09 deg/d
Q 2.708190589473817 1.2353e-08 au
  Orbit Determination Parameters
   # obs. used (total)      575  
   data-arc span      8498 days (23.27 yr)  
   first obs. used      1997-10-01  
   last obs. used      2021-01-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .59315  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 17:07:59  

Additional Information
 Earth MOID = 1.21974 au 
 Jupiter MOID = 2.36939 au 
 T_jup = 3.485 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457423.5 (2016-Feb-05.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1017234330403306 6.0399e-08  
q 2.206740895924323 1.5051e-07 au
tp 2458025.744598889898
(2017-Sep-29.24459889)
0.000164 TDB
node 267.6033439360684 0.00036959 deg
peri 204.5033036597671 0.00037226 deg
i .9531906890031416 3.7488e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      575  
   data-arc span      8498 days (23.27 yr)  
   first obs. used      1997-10-01  
   last obs. used      2021-01-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .59315  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 17:07:59  

Additional Information
 Jupiter MOID = 2.36939 au 
 T_jup = 3.485 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.648022565093792E-15 -9.071020946594814E-15 6.884235379071772E-12 1.026747459846997E-13 1.980023757581805E-12 6.49398739692015E-16
q -9.071020946594814E-15 2.265355971252875E-14 -1.681845125989279E-11 -2.527216863182945E-13 -4.857753679330688E-12 -1.553592469992745E-15
tp 6.884235379071772E-12 -1.681845125989279E-11 2.689513672012496E-8 3.102116140779095E-10 7.345082134496042E-9 3.196751478135744E-12
node 1.026747459846997E-13 -2.527216863182945E-13 3.102116140779095E-10 1.365966894693347E-7 -1.364884380040162E-7 -1.143466551082313E-10
peri 1.980023757581805E-12 -4.857753679330688E-12 7.345082134496042E-9 -1.364884380040162E-7 1.385795302923685E-7 1.152287877172983E-10
i 6.49398739692015E-16 -1.553592469992745E-15 3.196751478135744E-12 -1.143466551082313E-10 1.152287877172983E-10 1.405341762765238E-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 16.43   n/a E2021B55  
diameter diameter 1.628 km 0.726 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.183   0.152 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

120749 (1997 WR12)          Discovered 1997-Nov-23 by Spacewatch at Kitt Peak
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

[ 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
1957-Sep-26 17:25 00:02 Iris 0.0482280742239819 0.0482227154837012 0.0482334345277602 4.32912943382075 4.32912940628655 2436108.225501029 1.69906598821129 518.601666393685 60.7726558973187 59.6588584147963 102649.638393252 T 19 CATAB v2.0f-lin.ifort 2021-Apr-13 17:08:00 2021-Apr-13 17:08

Alternate Designations
 1997 WR12 = 2001 VD110 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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