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2405 Welch (1963 UF)
Classification: Outer 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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .136864038490536 3.8925e-08  
a 3.204422294881441 1.8222e-08 au
q 2.765852118574855 1.2772e-07 au
i 2.250654643987678 4.4535e-06 deg
node 128.0750082448853 0.00010693 deg
peri 3.2110216527869 0.00010797 deg
M 134.3214480663197 1.5124e-05 deg
tp 2457818.753567069149
(2017-Mar-06.25356707)
8.7127e-05 TDB
period 2095.188221289532
5.74
1.7872e-05
4.893e-08
d
yr
n .1718222717854102 1.4656e-09 deg/d
Q 3.642992471188026 2.0716e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2331  
   data-arc span      24851 days (68.04 yr)  
   first obs. used      1951-08-06  
   last obs. used      2019-08-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45742  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-23 19:24:35  

Additional Information
 Earth MOID = 1.78088 au 
 Jupiter MOID = 1.40438 au 
 T_jup = 3.177 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456310.5 (2013-Jan-18.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1332704064543383 3.8772e-08  
q 2.777605299962224 1.2584e-07 au
tp 2455717.859628410466
(2011-Jun-05.35962841)
8.9602e-05 TDB
node 128.2616100701921 0.00010733 deg
peri 2.303792653305856 0.00010845 deg
i 2.247229325921454 4.4454e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2331  
   data-arc span      24851 days (68.04 yr)  
   first obs. used      1951-08-06  
   last obs. used      2019-08-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45742  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-23 19:24:35  

Additional Information
 Jupiter MOID = 1.40438 au 
 T_jup = 3.177 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.503262939275065E-15 -4.844290741723547E-15 7.703973459541418E-13 -2.522184223816591E-15 1.319464119377214E-13 -2.025498709063443E-16
q -4.844290741723547E-15 1.583567135579015E-14 -2.522016216111597E-12 1.490431967809472E-14 -4.254457028227985E-13 8.256092659135235E-16
tp 7.703973459541418E-13 -2.522016216111597E-12 8.028565213250299E-9 -2.355001898811067E-11 1.420178416006098E-9 -8.960890255103602E-13
node -2.522184223816591E-15 1.490431967809472E-14 -2.355001898811067E-11 1.152039940977073E-8 -1.151432292721619E-8 1.089089206567798E-10
peri 1.319464119377214E-13 -4.254457028227985E-13 1.420178416006098E-9 -1.151432292721619E-8 1.176131894093015E-8 -1.089606957366946E-10
i -2.025498709063443E-16 8.256092659135235E-16 -8.960890255103602E-13 1.089089206567798E-10 -1.089606957366946E-10 1.976154831261288E-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 12.09   n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 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 1.87623531614284 1.87623384082439 1.87623679146203 3.36484581690376 3.2278927410347 2434106.336177648 2.46169425544148 103.283763897959 21.2285093304472 59.954780096065 2077609.92956905 T 25 CATAB v2.0f-lin.ifort 2019-Sep-23 19:24:45 2019-Sep-23 19:24
1963-Apr-07 00:57 00:02 Jupiter 1.63240060598123 1.63239953103792 1.63240168092473 2.19642117684446 1.94589386558765 2438126.539556577 2.02376920401329 96.0584220474997 7.75506496846384 89.8350103311742 1615935.24241488 T 25 CATAB v2.0f-lin.ifort 2019-Sep-23 19:24:45 2019-Sep-23 19:24
1974-May-08 18:26 00:01 Jupiter 1.48853801876853 1.48853747828125 1.48853855925506 1.55921736804382 1.13714518317882 2442176.268125991 1.42958330127608 124.891867250437 115.975030100077 -33.1050038132956 1549864.99436119 T 25 CATAB v2.0f-lin.ifort 2019-Sep-23 19:24:45 2019-Sep-23 19:24
1985-Jul-04 03:39 < 00:01 Jupiter 1.48482358957818 1.48482322619192 1.48482395296394 1.42406999138197 0.941843267964539 2446250.652133914 0.922961900634007 180.172182777898 113.075601388725 31.5340011352727 2214847.99405221 T 25 CATAB v2.0f-lin.ifort 2019-Sep-23 19:24:45 2019-Sep-23 19:24
1996-Aug-27 01:27 < 00:01 Jupiter 1.60739304728945 1.60739264855845 1.60739344602009 1.68770333887749 1.33956491516391 2450322.560585577 0.552354555138694 71.8467370453247 42.8435320665323 83.9804550707462 2413625.67557091 T 25 CATAB v2.0f-lin.ifort 2019-Sep-23 19:24:45 2019-Sep-23 19:24
2007-Sep-28 20:53 < 00:01 Jupiter 1.82681564132321 1.82681523110095 1.82681605154538 2.35782855890519 2.15221611976862 2454372.370101132 0.287009765522804 51.1216501973522 7.14829065643674 -88.2206924966687 3080083.28256277 T 25 CATAB v2.0f-lin.ifort 2019-Sep-23 19:24:45 2019-Sep-23 19:24
2118-Feb-23 16:06 00:02 Jupiter 1.7245785223528 1.72457734001277 1.72457970469313 2.60998268941182 2.41448017993371 2494697.170676790 2.14827395820711 88.7904728814811 11.996463066053 75.5584798859053 1757117.9773125 T 25 CATAB v2.0f-lin.ifort 2019-Sep-23 19:24:45 2019-Sep-23 19:24
2129-Mar-12 17:20 00:02 Jupiter 1.51547031861655 1.51546947996917 1.51547115726376 1.71850740866405 1.35478160477866 2498732.222059707 2.28191071488216 141.07294003491 69.8211793821569 -61.513316127897 1363640.91771229 T 25 CATAB v2.0f-lin.ifort 2019-Sep-23 19:24:45 2019-Sep-23 19:24
2140-May-02 10:29 00:03 Jupiter 1.44225593291312 1.44225554427324 1.44225632155251 1.38884521020408 0.868510781588595 2502800.937084069 2.50188857591003 253.215077786729 220.77355123032 24.7750093436781 1817867.00605074 T 25 CATAB v2.0f-lin.ifort 2019-Sep-23 19:24:45 2019-Sep-23 19:24
2151-Jul-02 01:30 00:03 Jupiter 1.51225441310417 1.51225331780691 1.51225550840211 1.49889713884259 1.06135807784655 2506878.562286654 3.03786918514692 218.252343676886 81.7632021609739 48.6368192309467 1913883.53466476 T 25 CATAB v2.0f-lin.ifort 2019-Sep-23 19:24:45 2019-Sep-23 19:24
2162-Aug-09 23:13 00:04 Jupiter 1.70924891698854 1.70924688301273 1.70925095096095 2.04168882227873 1.7825230194958 2510935.467707028 3.72330871861775 58.4892845848812 11.3649574119847 -87.0910556524899 731620.620506295 T 25 CATAB v2.0f-lin.ifort 2019-Sep-23 19:24:45 2019-Sep-23 19:24
2173-Aug-27 22:58 00:04 Jupiter 1.97456302984349 1.97456052187107 1.97456553781512 2.96944807962337 2.82129185998775 2514971.456600488 4.21961378969957 116.839777001926 36.8607534576872 42.9142471242093 1173701.14278041 T 25 CATAB v2.0f-lin.ifort 2019-Sep-23 19:24:45 2019-Sep-23 19:24

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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