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181775 (1997 TW1)
Classification: Main-belt Asteroid          SPK-ID: 2181775
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3163787122856822 1.4031e-07  
a 2.547588652030327 2.1328e-08 au
q 1.741585834867355 3.6937e-07 au
i 12.03713879513213 8.121e-06 deg
node 7.052190682088373 3.6981e-05 deg
peri 299.2801006371317 3.8744e-05 deg
M 293.4332050901398 1.5741e-05 deg
tp 2459475.129718336443
(2021-Sep-17.62971834)
6.7705e-05 TDB
period 1485.225460156183
4.07
1.8651e-05
5.106e-08
d
yr
n .2423874419457793 3.0439e-09 deg/d
Q 3.353591469193299 2.8076e-08 au
  Orbit Determination Parameters
   # obs. used (total)      266  
   data-arc span      8208 days (22.47 yr)  
   first obs. used      1997-10-02  
   last obs. used      2020-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .60424  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:31:59  

Additional Information
 Earth MOID = .762634 au 
 Jupiter MOID = 2.07631 au 
 T_jup = 3.341 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456285.5 (2012-Dec-24.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3186748440839052 1.4111e-07  
q 1.734985846091293 3.7241e-07 au
tp 2456501.843808262366
(2013-Jul-28.34380826)
4.1806e-05 TDB
node 7.182994246648783 3.71e-05 deg
peri 298.8632006753667 3.8755e-05 deg
i 12.02594716758135 8.1138e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      266  
   data-arc span      8208 days (22.47 yr)  
   first obs. used      1997-10-02  
   last obs. used      2020-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .60424  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:31:59  

Additional Information
 Jupiter MOID = 2.07631 au 
 T_jup = 3.341 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.991272690109963E-14 -5.253806259756714E-14 -1.344588523474406E-12 4.344662261936224E-14 -5.222582018424991E-13 -1.136310994658366E-13
q -5.253806259756714E-14 1.386882948311349E-13 3.673646328976299E-12 -1.098517862759882E-13 1.389418094961957E-12 2.997434064755389E-13
tp -1.344588523474406E-12 3.673646328976299E-12 1.74772232836882E-9 -3.184547421652689E-12 5.043990581469927E-10 8.491361000929394E-12
node 4.344662261936224E-14 -1.098517862759882E-13 -3.184547421652689E-12 1.37640209302306E-9 -1.3483100171649E-9 -7.335266332735513E-11
peri -5.222582018424991E-13 1.389418094961957E-12 5.043990581469927E-10 -1.3483100171649E-9 1.501978064228147E-9 7.534407944249632E-11
i -1.136310994658366E-13 2.997434064755389E-13 8.491361000929394E-12 -7.335266332735513E-11 7.534407944249632E-11 6.583432312037896E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.34   n/a E2021B55  

181775 (1997 TW1)          Discovered 1997-Oct-03 by ODAS at Caussols
Reference: 20080420/Numbers.arcLast Updated: 2008-04-23

Alternate Designations
 1997 TW1 = 2001 QA257 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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