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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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1391941273203805 3.8812e-08  
a 3.197815247839075 1.7323e-08 au
q 2.752698145084309 1.2669e-07 au
i 2.25380064956361 4.459e-06 deg
node 128.0573814165295 0.00010585 deg
peri 3.097240668988009 0.00010684 deg
M 203.2714324241483 1.4942e-05 deg
tp 2459909.835495603054
(2022-Nov-26.33549560)
8.903e-05 TDB
period 2088.711608103399
5.72
1.6972e-05
4.647e-08
d
yr
n .1723550530400359 1.4005e-09 deg/d
Q 3.642932350593842 1.9734e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2384  
   data-arc span      25152 days (68.86 yr)  
   first obs. used      1951-08-06  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45624  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:44:46  

Additional Information
 Earth MOID = 1.76734 au 
 Jupiter MOID = 1.40379 au 
 T_jup = 3.179 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456360.5 (2013-Mar-09.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1332993315811963 3.8734e-08  
q 2.777538629772769 1.2575e-07 au
tp 2455717.920551857254
(2011-Jun-05.42055186)
8.9012e-05 TDB
node 128.2606839056848 0.00010643 deg
peri 2.312591256606228 0.00010753 deg
i 2.247248235468926 4.4417e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2384  
   data-arc span      25152 days (68.86 yr)  
   first obs. used      1951-08-06  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45624  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:44:46  

Additional Information
 Jupiter MOID = 1.40379 au 
 T_jup = 3.179 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.500352008664837E-15 -4.836554931599453E-15 7.765923877013093E-13 -2.2338150389854E-15 1.329084617739509E-13 -2.031144867711385E-16
q -4.836554931599453E-15 1.581391989135217E-14 -2.528020293899016E-12 1.379061850725492E-14 -4.256225271573444E-13 8.267594436220915E-16
tp 7.765923877013093E-13 -2.528020293899016E-12 7.923049525866279E-9 -2.241700754328876E-11 1.398253819238037E-9 -8.935067244788843E-13
node -2.2338150389854E-15 1.379061850725492E-14 -2.241700754328876E-11 1.132682190654E-8 -1.132070448795453E-8 1.094069907700818E-10
peri 1.329084617739509E-13 -4.256225271573444E-13 1.398253819238037E-9 -1.132070448795453E-8 1.15635576290656E-8 -1.094577394981137E-10
i -2.031144867711385E-16 8.267594436220915E-16 -8.935067244788843E-13 1.094069907700818E-10 -1.094577394981137E-10 1.972876785664383E-11

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

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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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