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180993 (2005 NQ20)
Classification: Main-belt Asteroid          SPK-ID: 2180993
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2203099537821437 5.3139e-08  
a 2.469300157251246 1.6151e-08 au
q 1.925288753732984 1.3193e-07 au
i 4.660605045848338 8.168e-06 deg
node 334.2673285242496 4.988e-05 deg
peri 319.4288879319001 5.2855e-05 deg
M 341.8264017859722 1.7637e-05 deg
tp 2459272.048029032330
(2021-Feb-26.54802903)
6.9729e-05 TDB
period 1417.291729920458
3.88
1.3905e-05
3.807e-08
d
yr
n .2540055744347031 2.492e-09 deg/d
Q 3.013311560769509 1.9709e-08 au
  Orbit Determination Parameters
   # obs. used (total)      327  
   data-arc span      8892 days (24.34 yr)  
   first obs. used      1996-01-12  
   last obs. used      2020-05-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53742  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:28:47  

Additional Information
 Earth MOID = .910243 au 
 Jupiter MOID = 2.20567 au 
 T_jup = 3.447 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457439.5 (2016-Feb-21.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2198157217837587 5.3088e-08  
q 1.927797678646379 1.3151e-07 au
tp 2457853.641248008603
(2017-Apr-10.14124801)
6.517e-05 TDB
node 334.312809928746 4.9841e-05 deg
peri 319.1393906161384 5.2832e-05 deg
i 4.66152230971536 8.1678e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      327  
   data-arc span      8892 days (24.34 yr)  
   first obs. used      1996-01-12  
   last obs. used      2020-05-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53742  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:28:47  

Additional Information
 Jupiter MOID = 2.20567 au 
 T_jup = 3.447 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.818388167744856E-15 -6.94857539610681E-15 2.351232502009847E-12 1.624618914836529E-15 6.273963141384894E-13 2.678281819280405E-15
q -6.94857539610681E-15 1.729531397546572E-14 -5.585444667893703E-12 -4.985193209081945E-15 -1.504344834752437E-12 -6.249347000492356E-15
tp 2.351232502009847E-12 -5.585444667893703E-12 4.247117194359135E-9 -4.446866548184754E-12 1.149414592478754E-9 2.752704371329612E-12
node 1.624618914836529E-15 -4.985193209081945E-15 -4.446866548184754E-12 2.484112847533919E-9 -2.476405169174746E-9 1.372121334242321E-10
peri 6.273963141384894E-13 -1.504344834752437E-12 1.149414592478754E-9 -2.476405169174746E-9 2.791235835852202E-9 -1.360853498736852E-10
i 2.678281819280405E-15 -6.249347000492356E-15 2.752704371329612E-12 1.372121334242321E-10 -1.360853498736852E-10 6.671266169617769E-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 16.31   n/a E2021B55  

180993 (2005 NQ20)          Discovered 2005-Jul-02 by Broughton, J. at Reedy Creek
Reference: 20080321/Numbers.arcLast Updated: 2008-03-26

[ 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
1983-Feb-16 01:39 < 00:01 Amphi 0.0222952070713255 0.0222931970658388 0.0222972170776828 5.1709274000055 5.17092735014082 2445381.568900593 0.515280661808314 370.087083185984 100.181188002115 89.6873369610265 33281.2265525047 T 17 CATAB v2.0f-lin.ifort 2021-Apr-13 21:28:48 2021-Apr-13 21:28
2104-Apr-17 04:05 00:03 Inter 0.0489545142091356 0.048940302845231 0.0489687279378822 4.97305980501251 4.97305974488098 2489636.670097071 3.41380755317795 888.698574015006 29.34871606226 37.1751086118277 150834.595627179 T 17 CATAB v2.0f-lin.ifort 2021-Apr-13 21:28:48 2021-Apr-13 21:28

Alternate Designations
 2005 NQ20 = 1978 NB5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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