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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 ]

[ 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

[ 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
1905-May-08 11:01 00:02 Jupiter 1.93104751813187 1.93104664009922 1.9310483961687 3.94953504524134 3.83686847254422 2416973.959186561 2.45427668271049 160.79554776324 15.3618069262207 75.4900670986855 4470195.43152728 T 39 CATAB v2.0f-lin.ifort 2020-Feb-22 16:37:25 2020-Feb-22 16:37
1952-May-18 15:29 00:01 Jupiter 1.87486161706908 1.87486114336572 1.87486209077351 3.94971236551241 3.83362366441936 2434151.144897760 1.39172061027885 110.123820616361 15.69431739874 81.9971542209747 3931051.20615699 T 39 CATAB v2.0f-lin.ifort 2020-Feb-22 16:37:25 2020-Feb-22 16:37
1999-May-31 01:24 < 00:01 Jupiter 1.85594183526056 1.85594145186572 1.8559422186553 3.94507782968427 3.82764558145995 2451329.557990488 0.363073124347065 44.2897424335578 16.9264726399999 88.6085376099529 3601999.44573021 T 39 CATAB v2.0f-lin.ifort 2020-Feb-22 16:37:25 2020-Feb-22 16:37
2046-Jun-12 00:05 < 00:01 Jupiter 1.87420763165152 1.87420718827821 1.87420807502495 3.9260078215187 3.80915538639708 2468508.503301329 0.731347145965069 62.0668120394946 17.8021863147747 -80.979265715534 3334137.96978368 T 39 CATAB v2.0f-lin.ifort 2020-Feb-22 16:37:25 2020-Feb-22 16:37
2093-Jun-22 22:10 00:02 Jupiter 1.91695230939601 1.9169516275935 1.91695299120025 3.88211071364624 3.7665721435601 2485686.423653496 1.786339855804 125.30920646434 18.9070559696872 -77.4394235972391 3310360.36333546 T 39 CATAB v2.0f-lin.ifort 2020-Feb-22 16:37:25 2020-Feb-22 16:37
2140-Jul-01 07:45 00:03 Jupiter 1.98507324045959 1.98507210829539 1.98507437262797 3.84009017381492 3.72731818347384 2502860.822724890 2.85533459566519 168.227781960138 19.4049962251329 -71.6408672398316 3436218.30499109 T 39 CATAB v2.0f-lin.ifort 2020-Feb-22 16:37:25 2020-Feb-22 16:37
2178-Mar-24 22:49 00:04 Jupiter 1.93045648738381 1.9304554826338 1.93045749214259 3.8313614870703 3.71507669657548 2516641.450770534 3.68042950705284 226.593616807483 14.7952245121049 77.2944676869238 4113152.39032876 T 39 CATAB v2.0f-lin.ifort 2020-Feb-22 16:37:25 2020-Feb-22 16:37

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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