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3476 Dongguan (1978 UF2)
Classification: Main-belt Asteroid          SPK-ID: 2003476
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1948931840240467 4.1482e-08  
a 3.159044287286551 1.8574e-08 au
q 2.5433680876643 1.2794e-07 au
i 21.60577678652782 4.8321e-06 deg
node 43.81522758021706 1.1006e-05 deg
peri 25.46839366300165 1.5978e-05 deg
M 153.9556514613543 1.1478e-05 deg
tp 2458323.448423588395
(2018-Jul-23.94842359)
6.34e-05 TDB
period 2050.84103448735
5.61
1.8087e-05
4.952e-08
d
yr
n .1755377398570482 1.5481e-09 deg/d
Q 3.774720486908802 2.2194e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2213  
   data-arc span      16150 days (44.22 yr)  
   first obs. used      1976-05-31  
   last obs. used      2020-08-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .37865  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:59:57  

Additional Information
 Earth MOID = 1.56923 au 
 Jupiter MOID = 1.69319 au 
 T_jup = 3.068 
[ show covariance matrix ]

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 11.86   n/a E2021B10  
diameter diameter 31.53 km 2.4 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 2
geometric albedo albedo 0.0309   0.005 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 2

3476 Dongguan (1978 UF2)          Discovered 1978-Oct-28 by Purple Mountain Observatory at Nanking
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1978 UF2 = 1984 WH 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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