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1695 Walbeck (1941 UO)
Classification: Main-belt Asteroid          SPK-ID: 2001695
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 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2891888214951667 3.3467e-08  
a 2.783944573662667 7.4399e-09 au
q 1.978858923297296 9.194e-08 au
i 16.68301382913229 4.5209e-06 deg
node 218.4098662431126 1.0641e-05 deg
peri 139.2859980600943 1.2955e-05 deg
M 353.9894288646891 6.2306e-06 deg
tp 2459028.827127956602
(2020-Jun-28.32712796)
2.9411e-05 TDB
period 1696.638444966867
4.65
6.8012e-06
1.862e-08
d
yr
n .2121842759534017 8.5057e-10 deg/d
Q 3.589030224028039 9.5914e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2290  
   data-arc span      28870 days (79.04 yr)  
   first obs. used      1941-10-15  
   last obs. used      2020-10-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43479  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:16:25  

Additional Information
 Earth MOID = 1.00643 au 
 Jupiter MOID = 2.02909 au 
 T_jup = 3.211 
[ 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 12.5   n/a MPO350812  
diameter diameter 18.953 km 0.258 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.1607 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Szekely, P.; Kiss, L.L.; Szabo, Gy.M.; Sarneczky, K.; et al. (2005) Planet. Space Sci. 53, 925-936.]
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2015) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.042   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
SMASSII spectral type spec_B Cg   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)

1695 Walbeck           Discovered 1941 Oct. 15 by L. Oterma at Turku.
Named in memory of H. J. Walbeck (1793-1822), astronomer at the old Academia Aboensis who used the method of least squares to derive a good value for the earth's flattening.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC 5281Last Updated: 2007-10-23

[ show close-approach data ]
Alternate Designations
 1941 UO = 1964 QA = 1964 RE 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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