Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
74861 (1999 TW90)
Classification: Main-belt Asteroid          SPK-ID: 2074861
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 .1712546480238552 3.5916e-08  
a 2.209595054151728 8.0236e-09 au
q 1.831191630877723 7.9423e-08 au
i 6.876326875369791 5.3887e-06 deg
node 63.29341655623826 3.4173e-05 deg
peri 219.5272677770432 3.8663e-05 deg
M 169.2751239019083 2.0948e-05 deg
tp 2458436.397401659382
(2018-Nov-13.89740166)
6.8161e-05 TDB
period 1199.68564028523
3.28
6.5346e-06
1.789e-08
d
yr
n .3000786105220103 1.6345e-09 deg/d
Q 2.587998477425734 9.3977e-09 au
  Orbit Determination Parameters
   # obs. used (total)      959  
   data-arc span      7732 days (21.17 yr)  
   first obs. used      1999-09-14  
   last obs. used      2020-11-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53192  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 22:01:14  

Additional Information
 Earth MOID = .820887 au 
 Jupiter MOID = 2.5514 au 
 T_jup = 3.630 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456841.5 (2014-Jul-03.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1711229912772937 3.583e-08  
q 1.831515708884039 7.9139e-08 au
tp 2457237.309594736538
(2015-Aug-02.80959474)
6.5184e-05 TDB
node 63.31299848696419 3.4176e-05 deg
peri 219.5511356670121 3.8693e-05 deg
i 6.876182187369274 5.3886e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      959  
   data-arc span      7732 days (21.17 yr)  
   first obs. used      1999-09-14  
   last obs. used      2020-11-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53192  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 22:01:14  

Additional Information
 Jupiter MOID = 2.5514 au 
 T_jup = 3.630 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.283792703084893E-15 -2.825524312452897E-15 -6.476200909674725E-13 4.911859207985575E-16 -1.92366509948005E-13 -2.15386613222285E-16
q -2.825524312452897E-15 6.262977264422775E-15 1.619665580743133E-12 -2.011203698818791E-15 4.719698758457422E-13 6.444172835164231E-16
tp -6.476200909674725E-13 1.619665580743133E-12 4.248996403311694E-9 -4.80422879046167E-12 1.194045393219209E-9 1.094908788274692E-12
node 4.911859207985575E-16 -2.011203698818791E-15 -4.80422879046167E-12 1.168008309110546E-9 -1.160525370664462E-9 -6.035045573518557E-11
peri -1.92366509948005E-13 4.719698758457422E-13 1.194045393219209E-9 -1.160525370664462E-9 1.497174418880865E-9 6.025406764557874E-11
i -2.15386613222285E-16 6.444172835164231E-16 1.094908788274692E-12 -6.035045573518557E-11 6.025406764557874E-11 2.903678659306073E-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 15.7   n/a MPO502609  

74861 (1999 TW90)          Discovered 1999-Oct-02 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 TW90 = 2001 DL3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jan-22 20:21 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin