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2078 Nanking (1975 AD)
Classification: Mars-crossing Asteroid          SPK-ID: 2002078
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3750132033166705 1.2105e-08  
a 2.368885415398657 8.4826e-09 au
q 1.480522107479865 2.864e-08 au
i 20.16536658810679 4.8091e-07 deg
node 286.9759341252371 2.6939e-06 deg
peri 99.4215515283294 2.5723e-06 deg
M 303.5014875033501 3.9345e-06 deg
tp 2459605.501316168351
(2022-Jan-26.00131617)
1.5657e-05 TDB
period 1331.724863111531
3.65
7.153e-06
1.958e-08
d
yr
n .2703261086219205 1.452e-09 deg/d
Q 3.25724872331745 1.1664e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1572  
   data-arc span      16970 days (46.46 yr)  
   first obs. used      1975-01-12  
   last obs. used      2021-06-29  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .38233  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 13:07:15  

Additional Information
 Earth MOID = .634483 au 
 Jupiter MOID = 2.62343 au 
 T_jup = 3.371 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457215.5 (2015-Jul-12.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3734490719399503 1.2034e-08  
q 1.485083904607376 2.8415e-08 au
tp 2456942.377797755404
(2014-Oct-11.87779776)
3.1006e-06 TDB
node 287.1228219489839 2.6867e-06 deg
peri 99.38465417215839 2.5674e-06 deg
i 20.16918786732329 4.821e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      1572  
   data-arc span      16970 days (46.46 yr)  
   first obs. used      1975-01-12  
   last obs. used      2021-06-29  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .38233  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 13:07:15  

Additional Information
 Jupiter MOID = 2.62343 au 
 T_jup = 3.371 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.44808519646137E-16 -3.357860558681449E-16 -1.035011404559569E-14 -1.060233594617016E-14 2.093545708762358E-15 -3.06148337543817E-15
q -3.357860558681449E-16 8.074056926628725E-16 2.942159047670038E-14 2.52908439840489E-14 -2.457541406259083E-15 7.372094527687749E-15
tp -1.035011404559569E-14 2.942159047670038E-14 9.613696837558636E-12 1.254810189658964E-12 1.699654664194019E-12 2.930688344229992E-13
node -1.060233594617016E-14 2.52908439840489E-14 1.254810189658964E-12 7.218583327344706E-12 -6.152292207328143E-12 7.157633297927267E-13
peri 2.093545708762358E-15 -2.457541406259083E-15 1.699654664194019E-12 -6.152292207328143E-12 6.591466744628263E-12 -4.130875707036177E-13
i -3.06148337543817E-15 7.372094527687749E-15 2.930688344229992E-13 7.157633297927267E-13 -4.130875707036177E-13 2.324228850063455E-13

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.07   n/a E2021B10  
diameter diameter 4.639 km 0.535 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
rotation period rot_per 6.473 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Chernova, G.P.; Minikulov, N.X.; Kiselev, N.N. (1994) Planet. Space Sci. 42, 651-653.]
[De Sanctis, M.C.; Barucci, M.A.; Angeli, C.A.; Fulchignoni, M.; et al. (1994) Planet. Space Sci. 42, 859-864.]
[Mohamed, R.A.; Krugly, Yu.N.; Velichko, F.P. (1994) Planet. Space Sci. 42, 341-343.]
[Garceran, A.C. (2014) Posting on CALL web site. http://www.MinorPlanet.info/call.html]
[Warner, B.D. (2015) Minor Planet Bull. 42, 54-60.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.404   0.239 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
SMASSII spectral type spec_B Sq   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)

2078 Nanking (1975 AD)          Discovered 1975-Jan-12 by Purple Mountain Observatory at Nanking
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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