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3028 Zhangguoxi (1978 TA2)
Classification: Main-belt Asteroid          SPK-ID: 2003028
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0314759096813233 4.0501e-08  
a 3.017126839485268 1.4866e-08 au
q 2.922160027588534 1.2169e-07 au
i 9.513512156323367 4.7053e-06 deg
node 189.4593749800777 2.1767e-05 deg
peri 5.64536836099142 6.4632e-05 deg
M 182.4070040214048 6.1434e-05 deg
tp 2459944.804615157879
(2022-Dec-31.30461516)
0.000328 TDB
period 1914.20646734182
5.24
1.4148e-05
3.874e-08
d
yr
n .1880674870459075 1.39e-09 deg/d
Q 3.112093651382003 1.5334e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2713  
   data-arc span      43222 days (118.34 yr)  
   first obs. used      1902-04-04  
   last obs. used      2020-08-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46066  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:59:04  

Additional Information
 Earth MOID = 1.92113 au 
 Jupiter MOID = 1.84297 au 
 T_jup = 3.226 
[ 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 10.6   n/a MPO435726  
diameter diameter 25.58 km 1.4 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 7
rotation period rot_per 4.826 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Brinsfield, J.W. (2007) Minor Planet Bull. 34, 108-110.]
[Stephens, R.D. (2007) Minor Planet Bull. 34, 102-103.]
geometric albedo albedo 0.1417   0.017 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 7
SMASSII spectral type spec_B K   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

3028 Zhangguoxi (1978 TA2)          Discovered 1978-Oct-09 by Purple Mountain Observatory at Nanking
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1978 TA2 = 1931 XP = 1941 VD = 1949 FB1 = 1950 LC1 = 1965 JJ = 1970 FL = 1970 GQ = 1971 KC1 = 1983 TO = A902 GC = A904 SG 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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