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11823 Christen (1981 VF)
Classification: Main-belt Asteroid          SPK-ID: 2011823
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2484451171476664 4.2606e-08  
a 2.369472808950169 9.1677e-09 au
q 1.780788859352334 1.0022e-07 au
i 4.876505919392653 4.2567e-06 deg
node 32.1135759363301 4.1725e-05 deg
peri 321.3319484509098 4.2828e-05 deg
M 233.9535057291102 1.4786e-05 deg
tp 2459466.949134084500
(2021-Sep-09.44913408)		 5.6524e-05 TDB
period 1332.220219544822
3.65		 7.7317e-06
2.117e-08		 d
yr
n .2702255938759139 1.5683e-09 deg/d
Q 2.958156758548004 1.1445e-08 au
   Orbit Determination Parameters
   # obs. used (total)      1850  
   data-arc span      22197 days (60.77 yr)  
   first obs. used      1959-10-06  
   last obs. used      2020-07-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51519  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:57:03  

Additional Information
 Earth MOID = .779233 au 
 Jupiter MOID = 2.48738 au 
 T_jup = 3.499 
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[ 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 14.2   n/a MPO473926  
diameter diameter 4.148 km 0.049 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 16.3133 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.292   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

11823 Christen           Discovered 1981 Nov. 2 by B. A. Skiff at the Anderson Mesa Station of the Lowell Observatory.
Roland W. Christen (b. 1944) is an optician and maker of affordable apochromatic refractors at the forefront of mechanical and optical design. The citation was provided by S. and A. French.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20000124/MPCPages.arcLast Updated: 2013-03-29

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Alternate Designations
 1981 VF = 1959 TM = 1992 US3 
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