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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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456554.5 (2013-Sep-19.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1333963066169155 3.8511e-08  
q 2.777255931629507 1.2539e-07 au
tp 2455718.208278687353
(2011-Jun-05.70827869)
8.6595e-05 TDB
node 128.257311517392 0.00010236 deg
peri 2.351467580787935 0.00010343 deg
i 2.247412674665431 4.4178e-06 deg
  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
 Jupiter MOID = 1.40379 au 
 T_jup = 3.179 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.483069765775601E-15 -4.796565036612951E-15 8.619289690304346E-13 -2.108974943055009E-15 1.498755359052771E-13 -2.11193911911176E-16
q -4.796565036612951E-15 1.572371357323912E-14 -2.735389258363924E-12 1.280854248624962E-14 -4.662249849467181E-13 8.597958942497614E-16
tp 8.619289690304346E-13 -2.735389258363924E-12 7.498780606815564E-9 -2.024334143772194E-11 1.311280115251178E-9 -9.044297258493255E-13
node -2.108974943055009E-15 1.280854248624962E-14 -2.024334143772194E-11 1.047801194833184E-8 -1.047222946183133E-8 1.228642516698132E-10
peri 1.498755359052771E-13 -4.662249849467181E-13 1.311280115251178E-9 -1.047222946183133E-8 1.069844812892289E-8 -1.229046249270513E-10
i -2.11193911911176E-16 8.597958942497614E-16 -9.044297258493255E-13 1.228642516698132E-10 -1.229046249270513E-10 1.951661811724605E-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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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 20:05 00:02 Jupiter 1.87623575096492 1.87623427663692 1.87623722529366 3.36484800418037 3.22789505352554 2434106.336503564 2.44230993132064 102.288848616315 20.2332722950223 59.4450062474758 2164170.17440661 T 28 CATAB v2.0f-lin.ifort 2020-Aug-24 22:50:59 2020-Aug-24 22:51
1963-Apr-07 00:57 00:02 Jupiter 1.63240097347336 1.63239989911968 1.63240204782723 2.19642268400875 1.94589562682435 2438126.539816459 2.00685884946614 94.1999372084879 7.65013264416994 89.8963453662175 1661204.90282225 T 28 CATAB v2.0f-lin.ifort 2020-Aug-24 22:50:59 2020-Aug-24 22:51
1974-May-08 18:26 00:01 Jupiter 1.48853822315138 1.48853768316265 1.48853876313944 1.55921804483366 1.13714617987873 2442176.268290933 1.41575907736451 124.270465118974 114.811699919656 -29.3202401920562 1552492.9462656 T 28 CATAB v2.0f-lin.ifort 2020-Aug-24 22:50:59 2020-Aug-24 22:51
1985-Jul-04 03:39 < 00:01 Jupiter 1.48482363162757 1.48482326971066 1.48482399354398 1.42407011774913 0.941843476184535 2446250.652202872 0.914416319533101 179.643586000705 112.204139955817 31.8846732318023 2230452.32823773 T 28 CATAB v2.0f-lin.ifort 2020-Aug-24 22:50:59 2020-Aug-24 22:51
1996-Aug-27 01:27 < 00:01 Jupiter 1.60739296644729 1.60739257653203 1.60739335636228 1.68770308750409 1.33956457867678 2450322.560623229 0.550521671234405 71.6925833310878 41.9272289309437 83.8090858366051 2467260.22165059 T 28 CATAB v2.0f-lin.ifort 2020-Aug-24 22:50:59 2020-Aug-24 22:51
2007-Sep-28 20:53 < 00:01 Jupiter 1.82681548095418 1.82681509492682 1.82681586698153 2.35782796754712 2.15221545300288 2454372.370114670 0.2853828742547 51.0278776470811 6.88661023273926 -88.1724014813427 3270169.42279045 T 28 CATAB v2.0f-lin.ifort 2020-Aug-24 22:50:59 2020-Aug-24 22:51
2118-Feb-23 16:05 00:02 Jupiter 1.72457852887047 1.72457738396149 1.72457967377985 2.60998273128073 2.41448022596155 2494697.170428302 2.11847068884905 86.8453926942998 11.2796218416958 75.6646186027391 1842642.80291495 T 28 CATAB v2.0f-lin.ifort 2020-Aug-24 22:50:59 2020-Aug-24 22:51
2129-Mar-12 17:19 00:02 Jupiter 1.51547036774591 1.5154695470312 1.51547118846044 1.71850748160596 1.35478171067802 2498732.221776107 2.25469654010711 138.281010632627 68.3762868738543 -61.0939850372628 1391232.47002186 T 28 CATAB v2.0f-lin.ifort 2020-Aug-24 22:50:59 2020-Aug-24 22:51
2140-May-02 10:29 00:02 Jupiter 1.44225604308571 1.44225565541714 1.4422564307538 1.38884531046286 0.868510993568058 2502800.936736596 2.47407084182963 252.433958569274 218.236522548887 22.9197636440058 1819666.02316218 T 28 CATAB v2.0f-lin.ifort 2020-Aug-24 22:50:59 2020-Aug-24 22:51
2151-Jul-02 01:29 00:03 Jupiter 1.51225460751751 1.51225354013119 1.5122556749046 1.49889751503012 1.06135867695889 2506878.561854659 3.00133086764583 213.6839208933 80.2329920652214 49.3320239359086 1966892.59905783 T 28 CATAB v2.0f-lin.ifort 2020-Aug-24 22:50:59 2020-Aug-24 22:51
2162-Aug-09 23:13 00:04 Jupiter 1.70924918098498 1.70924719640186 1.70925116556489 2.04168957375464 1.78252392316926 2510935.467208050 3.67453558521723 57.9868247081801 11.2806835070268 -87.1748511939068 753784.487327641 T 28 CATAB v2.0f-lin.ifort 2020-Aug-24 22:50:59 2020-Aug-24 22:51
2173-Aug-27 22:57 00:04 Jupiter 1.97456330289983 1.97456085164285 1.97456575415613 2.96944903096249 2.82129288231112 2514971.456060274 4.16306658097272 114.80835023758 36.5647381003175 43.2599607463412 1197601.57984296 T 28 CATAB v2.0f-lin.ifort 2020-Aug-24 22:50:59 2020-Aug-24 22:51

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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