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2405 Welch (1963 UF)
Classification: Main-belt Asteroid          SPK-ID: 2002405
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1391941242894901 3.8553e-08  
a 3.197815245347588 1.691e-08 au
q 2.75269815263185 1.262e-07 au
i 2.253800089606851 4.4346e-06 deg
node 128.0574164223987 0.00010181 deg
peri 3.0972082790904 0.00010276 deg
M 203.2714309490221 1.4779e-05 deg
tp 2459909.835503098978
(2022-Nov-26.33550310)
8.8326e-05 TDB
period 2088.711605662358
5.72
1.6567e-05
4.536e-08
d
yr
n .1723550532414642 1.3671e-09 deg/d
Q 3.642932338063327 1.9264e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2462  
   data-arc span      25200 days (68.99 yr)  
   first obs. used      1951-08-06  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45021  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:50:42  

Additional Information
 Earth MOID = 1.76734 au 
 Jupiter MOID = 1.40379 au 
 T_jup = 3.179 
[ 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 11.6   n/a MPO473797 IRAS observations used: 5
diameter diameter 22.360 km 0.412 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.052   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.698   0.037 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=1.10 deg.
U-B UB 0.312   0.055 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=1.10 deg.
Tholen spectral type spec_T BCU:   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices

2405 Welch (1963 UF)          Discovered 1963-Oct-18 by Goethe Link Observatory at Brooklyn
Discovered by the Indiana Asteroid Program, Goethe Link Observatory, University of Indiana. This program was conceived and directed by F. K. Edmondson; the plates were blinked and measured astrometrically by B. Potter and, following her retirement, by D. Owings; and the photometry was performed under the direction of T. Gehrels. During the years 1947-1967, in which the plates were exposed, a large number of people participated in various aspects of the program.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1963 UF = 1965 AG1 = 1969 VV = 1972 JQ1 = 1974 RR = 1975 WG1 = 1977 DN9 = 1977 FV1 = 1979 OJ6 = 1980 RC2 = 1980 TF = 1981 YB2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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