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 ]  
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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03147591050158228 4.0759e-08  
a 3.017126839922837 1.4954e-08 au
q 2.922160025537504 1.2231e-07 au
i 9.51351235735363 4.7236e-06 deg
node 189.4593747962385 2.1995e-05 deg
peri 5.645366449263212 6.5214e-05 deg
M 182.4070059388615 6.188e-05 deg
tp 2459944.804605167728
(2022-Dec-31.30460517)
0.00033027 TDB
period 1914.206467758241
5.24
1.4231e-05
3.896e-08
d
yr
n .1880674870049948 1.3982e-09 deg/d
Q 3.11209365430817 1.5425e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2680  
   data-arc span      43013 days (117.76 yr)  
   first obs. used      1902-04-04  
   last obs. used      2020-01-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46184  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:37:11  

Additional Information
 Earth MOID = 1.92113 au 
 Jupiter MOID = 1.84297 au 
 T_jup = 3.226 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456752.5 (2014-Apr-05.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02975706249184476 4.0067e-08  
q 2.929391416506456 1.1984e-07 au
tp 2456140.576057225005
(2012-Aug-01.07605723)
0.00035687 TDB
node 189.5348337189991 2.1955e-05 deg
peri 10.60931912361743 7.0465e-05 deg
i 9.518684843247334 4.729e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2680  
   data-arc span      43013 days (117.76 yr)  
   first obs. used      1902-04-04  
   last obs. used      2020-01-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46184  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:37:11  

Additional Information
 Jupiter MOID = 1.84297 au 
 T_jup = 3.226 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.60535118467262E-15 -4.766546448958157E-15 -5.036920434303761E-12 1.905278940544706E-15 -9.509547364330166E-13 -2.654203887566722E-16
q -4.766546448958157E-15 1.436273833391845E-14 1.546098936454204E-11 -4.941687078655389E-15 2.927064872526625E-12 1.319270631780586E-15
tp -5.036920434303761E-12 1.546098936454204E-11 1.273561262647865E-7 -1.44936556028411E-12 2.391057382432391E-8 2.318381323024631E-12
node 1.905278940544706E-15 -4.941687078655389E-15 -1.44936556028411E-12 4.820046732474535E-10 -4.751600525224936E-10 -3.010623792914171E-11
peri -9.509547364330166E-13 2.927064872526625E-12 2.391057382432391E-8 -4.751600525224936E-10 4.965350562304288E-9 3.018189283667338E-11
i -2.654203887566722E-16 1.319270631780586E-15 2.318381323024631E-12 -3.010623792914171E-11 3.018189283667338E-11 2.236341070925653E-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 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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Jul-09 02:24 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin