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8313 Christiansen (1996 YU1)
Classification: Main-belt Asteroid          SPK-ID: 2008313
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1700833931704603 3.8365e-08  
a 2.611165825834825 1.3452e-08 au
q 2.167049882046091 1.0109e-07 au
i 14.70295794772593 3.8698e-06 deg
node 112.9514188409726 1.6447e-05 deg
peri 251.0993015495533 1.9975e-05 deg
M 292.8394116667513 1.3452e-05 deg
tp 2459288.016052996730
5.8439e-05 TDB
period 1541.168438924784
n .2335890035816972 1.805e-09 deg/d
Q 3.055281769623559 1.5739e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1623  
   data-arc span      10923 days (29.91 yr)  
   first obs. used      1990-05-26  
   last obs. used      2020-04-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48376  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 02:56:22  

Additional Information
 Earth MOID = 1.21263 au 
 Jupiter MOID = 2.4903 au 
 T_jup = 3.343 
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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.5   n/a MPO435778  
diameter diameter 5.201 km 0.030 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
geometric albedo albedo 0.313   0.083 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

8313 Christiansen           Discovered 1996 Dec. 19 by the Beijing Schmidt CCD Asteroid Program at Xinglong.
Named in honor of Wilbur N. Christiansen (b. 1913), foreign member of the Chinese Academy of Sciences and unfailing friend of Chinese astronomers. A pioneer in radio astronomy, he invented and developed a series of radio telescopes that in their time provided the highest angular resolution. These were the "grating telescope", the "grating cross" and the "rotational synthesis telescope". His textbook on radio telescopes, with Högbom, was translated into Russian and Chinese. Immediately after the discovery of the 21-cm hydrogen line in space, he confirmed this and went on to make the first map that showed we live in a spiral galaxy. He served as a vice president of the IAU and as president of URSI, and he is now an honorary president of URSI.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19981208/MPCPages.arcLast Updated: 2009-11-17

Alternate Designations
 1996 YU1 = 1990 KK1 = 1993 BW11 = 1995 OB2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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