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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3750714025888089 1.2357e-08  
a 2.368119293717493 9.0193e-09 au
q 1.479905468725254 2.8889e-08 au
i 20.16781616815598 4.8326e-07 deg
node 286.9735398966925 2.7058e-06 deg
peri 99.473395639652 2.5836e-06 deg
M 250.4490073840003 3.8517e-06 deg
tp 2459605.558366764512
(2022-Jan-26.05836676)
1.6514e-05 TDB
period 1331.078875262766
3.64
7.6044e-06
2.082e-08
d
yr
n .2704573009837098 1.5451e-09 deg/d
Q 3.256333118709733 1.2402e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1455  
   data-arc span      16627 days (45.52 yr)  
   first obs. used      1975-01-12  
   last obs. used      2020-07-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39129  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 13:18:47  

Additional Information
 Earth MOID = .633625 au 
 Jupiter MOID = 2.62268 au 
 T_jup = 3.371 
[ show covariance matrix ]

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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