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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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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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1391941278533239 3.8836e-08  
a 3.197815248683927 1.739e-08 au
q 2.752698144107308 1.2673e-07 au
i 2.253800685462322 4.4603e-06 deg
node 128.0573815571875 0.0001066 deg
peri 3.097239794299866 0.00010759 deg
M 203.2714328118389 1.4977e-05 deg
tp 2459909.835493714047
(2022-Nov-26.33549371)
8.9189e-05 TDB
period 2088.711608931145
5.72
1.7038e-05
4.665e-08
d
yr
n .1723550529717325 1.406e-09 deg/d
Q 3.642932353260546 1.9811e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2339  
   data-arc span      24931 days (68.26 yr)  
   first obs. used      1951-08-06  
   last obs. used      2019-11-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45752  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:20:49  

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

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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1952-Apr-03 20:04 00:02 Jupiter 1.87623574019517 1.87623426490145 1.87623721548974 3.36484792877467 3.22789497411773 2434106.336448182 2.46172876563108 103.284078569339 21.217014886275 59.9528790836997 2078909.91533863 T 26 CATAB v2.0f-lin.ifort 2020-Feb-22 16:21:07 2020-Feb-22 16:21
1963-Apr-07 00:57 00:02 Jupiter 1.63240096819958 1.63239989341961 1.63240204297972 2.19642265926368 1.94589559803196 2438126.539773391 2.02378974956383 96.0352486766384 7.74709930744683 89.8394955964051 1617936.73067493 T 26 CATAB v2.0f-lin.ifort 2020-Feb-22 16:21:07 2020-Feb-22 16:21
1974-May-08 18:26 00:01 Jupiter 1.48853821977605 1.48853767962054 1.48853875993088 1.55921801101394 1.13714613237154 2442176.268252459 1.42958760885036 124.852950522451 115.810939644691 -33.1190473636485 1551034.29347423 T 26 CATAB v2.0f-lin.ifort 2020-Feb-22 16:21:07 2020-Feb-22 16:21
1985-Jul-04 03:39 < 00:01 Jupiter 1.48482362150266 1.48482325828544 1.48482398471928 1.42407010004231 0.941843445281696 2446250.652186711 0.922958281467367 180.0523806338 112.974288057013 31.5013479423627 2215978.64601318 T 26 CATAB v2.0f-lin.ifort 2020-Feb-22 16:21:07 2020-Feb-22 16:21
1996-Aug-27 01:27 < 00:01 Jupiter 1.60739294147321 1.607392542767 1.60739334017906 1.68770306940452 1.33956454976142 2450322.560607219 0.552350278722823 71.7618278458443 42.8397625834297 83.9574637080576 2413671.53367054 T 26 CATAB v2.0f-lin.ifort 2020-Feb-22 16:21:07 2020-Feb-22 16:21
2007-Sep-28 20:53 < 00:01 Jupiter 1.82681544235726 1.82681503258457 1.82681585212984 2.35782791709725 2.15221539318157 2454372.370109216 0.28681779285357 51.0648708601888 7.13477865716141 -88.2219580167534 3082198.75409387 T 26 CATAB v2.0f-lin.ifort 2020-Feb-22 16:21:07 2020-Feb-22 16:21
2118-Feb-23 16:06 00:02 Jupiter 1.7245786111586 1.72457742971637 1.72457979260112 2.60998301495139 2.41448054230731 2494697.170491584 2.1478860453485 88.7792323286305 11.9819813036964 75.5644795220383 1759332.77859923 T 26 CATAB v2.0f-lin.ifort 2020-Feb-22 16:21:07 2020-Feb-22 16:21
2129-Mar-12 17:19 00:02 Jupiter 1.51547041586904 1.51546957798984 1.51547125374816 1.71850759746945 1.35478187074843 2498732.221837217 2.28172825936984 141.02529493335 69.717465425167 -61.514870936341 1365668.98691591 T 26 CATAB v2.0f-lin.ifort 2020-Feb-22 16:21:07 2020-Feb-22 16:21
2140-May-02 10:29 00:03 Jupiter 1.44225603683843 1.44225564848014 1.44225642519624 1.38884529714262 0.86851096933847 2502800.936795613 2.50194173422732 252.971186528761 220.651817589943 24.7632420532174 1819443.11387574 T 26 CATAB v2.0f-lin.ifort 2020-Feb-22 16:21:07 2020-Feb-22 16:21
2151-Jul-02 01:29 00:03 Jupiter 1.51225453818454 1.51225344279134 1.51225563357842 1.49889737315359 1.06135845239974 2506878.561940436 3.03808772594476 218.216775560486 81.7149462335524 48.6178497625403 1914774.93998621 T 26 CATAB v2.0f-lin.ifort 2020-Feb-22 16:21:07 2020-Feb-22 16:21
2162-Aug-09 23:13 00:04 Jupiter 1.70924905670494 1.70924702275753 1.70925109064905 2.0416891856761 1.78252345845308 2510935.467324158 3.72363156355513 58.4121938804682 11.3642605545881 -87.0867460139187 731705.61491825 T 26 CATAB v2.0f-lin.ifort 2020-Feb-22 16:21:07 2020-Feb-22 16:21
2173-Aug-27 22:57 00:04 Jupiter 1.97456315686654 1.97456064904964 1.97456566468266 2.96944844053252 2.82129224963063 2514971.456193948 4.22001871142091 116.828367271958 36.8151345007869 42.9042438941213 1174807.15314384 T 26 CATAB v2.0f-lin.ifort 2020-Feb-22 16:21:07 2020-Feb-22 16:21

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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