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JPL Small-Body Database Browser
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2778 Tangshan (1979 XP)
Classification: Main-belt Asteroid          SPK-ID: 2002778
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1217326788258468 4.1397e-08  
a 2.281359215867075 7.9887e-09 au
q 2.003643247155543 9.4188e-08 au
i 4.614566095121086 3.775e-06 deg
node 91.92968475897599 5.4166e-05 deg
peri 286.2511738426568 5.7048e-05 deg
M 205.1245703324642 2.1355e-05 deg
tp 2459141.963218430956
(2020-Oct-19.46321843)
7.6321e-05 TDB
period 1258.603505111074
3.45
6.6109e-06
1.81e-08
d
yr
n .2860313025810534 1.5024e-09 deg/d
Q 2.559075184578608 8.9611e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2051  
   data-arc span      25830 days (70.72 yr)  
   first obs. used      1948-11-28  
   last obs. used      2019-08-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45521  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-23 19:27:04  

Additional Information
 Earth MOID = 1.01076 au 
 Jupiter MOID = 2.89776 au 
 T_jup = 3.591 
[ 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 13.1   n/a MPO319118  
diameter diameter 12.545 km 0.186 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 3.461 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Warner, B.D. (2004) Minor Planet Bull. 31, 36-39.]
[Behrend, R. (2018) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.044   0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
SMASSII spectral type spec_B Cb   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)

2778 Tangshan (1979 XP)          Discovered 1979-Dec-14 by Purple Mountain Observatory at Nanking
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1979 XP = 1948 WL = 1965 UK = 1970 EG = 1977 ET = 1982 RN 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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