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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1948932136011109 1.5202e-08  
a 3.159044288451371 1.6792e-08 au
q 2.543367995166848 5.1745e-08 au
i 21.60576851121242 8.6879e-07 deg
node 43.81521358150871 1.3784e-06 deg
peri 25.46841603317203 4.9179e-06 deg
M 153.955644509079 6.6307e-06 deg
tp 2458323.448462708896
(2018-Jul-23.94846271)
3.6171e-05 TDB
period 2050.841035621645
5.61
1.6352e-05
4.477e-08
d
yr
n .1755377397599604 1.3996e-09 deg/d
Q 3.774720581735894 2.0065e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2280  
   data-arc span      16332 days (44.71 yr)  
   first obs. used      1976-05-31  
   last obs. used      2021-02-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .38671  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 15:10:17  

Additional Information
 Earth MOID = 1.56923 au 
 Jupiter MOID = 1.69319 au 
 T_jup = 3.068 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457412.5 (2016-Jan-25.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1953995529633919 1.5213e-08  
q 2.542241047161222 5.1851e-08 au
tp 2458324.876292948032
(2018-Jul-25.37629295)
3.6092e-05 TDB
node 43.83732921969872 1.3784e-06 deg
peri 25.86130245672602 4.9095e-06 deg
i 21.60487050730298 8.6866e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2280  
   data-arc span      16332 days (44.71 yr)  
   first obs. used      1976-05-31  
   last obs. used      2021-02-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .38671  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 15:10:17  

Additional Information
 Jupiter MOID = 1.69319 au 
 T_jup = 3.068 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.31440076140948E-16 -7.620675481900824E-16 3.409725307231353E-14 1.108613189380993E-14 -6.199470950371499E-15 1.605654134024343E-15
q -7.620675481900824E-16 2.688521705283478E-15 -4.273154459390563E-14 -3.261759960769386E-14 1.153509801139251E-14 -4.219972877263869E-15
tp 3.409725307231353E-14 -4.273154459390563E-14 1.302627968755676E-9 -3.178700251849263E-12 1.638570453871322E-10 -7.133674143035092E-12
node 1.108613189380993E-14 -3.261759960769386E-14 -3.178700251849263E-12 1.899945212333517E-12 -2.30630100077202E-12 -3.535687448817533E-13
peri -6.199470950371499E-15 1.153509801139251E-14 1.638570453871322E-10 -2.30630100077202E-12 2.41035514731616E-11 -4.69267941604294E-13
i 1.605654134024343E-15 -4.219972877263869E-15 -7.133674143035092E-12 -3.535687448817533E-13 -4.69267941604294E-13 7.545687867816067E-13

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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