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JPL Small-Body Database Browser
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4958 Wellnitz (1991 NT1)
Classification: Main-belt Asteroid          SPK-ID: 2004958
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07816884630794582 3.7239e-08  
a 3.010534363144631 1.694e-08 au
q 2.775204365207189 1.1454e-07 au
i 9.087542113570834 3.846e-06 deg
node 252.9788421751265 2.5153e-05 deg
peri 216.2330405893499 3.5862e-05 deg
M 34.27459101773034 2.4158e-05 deg
tp 2458818.850757777837
(2019-Dec-01.35075778)
0.00012828 TDB
period 1907.936032443111
5.22
1.6104e-05
4.409e-08
d
yr
n .1886855711504228 1.5926e-09 deg/d
Q 3.245864361082073 1.8265e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2597  
   data-arc span      32613 days (89.29 yr)  
   first obs. used      1931-01-13  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39267  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 02:14:42  

Additional Information
 Earth MOID = 1.79794 au 
 Jupiter MOID = 1.94337 au 
 T_jup = 3.226 
[ 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 MPO502200  
diameter diameter 16.358 km 0.244 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
geometric albedo albedo 0.182   0.047 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

4958 Wellnitz           Discovered 1991 July 13 by H. E. Holt at Palomar.
Named in honor of Dennis D. Wellnitz (b. 1951), University of Maryland instrument builder, observer, data analyst and all-around physicist. Wellnitz has designed and developed a wide variety of astronomical instrumentation, and he has participated in many major observational programs, including occultations by minor planets and comets and the 1994 cometary collision with Jupiter. His work with the NEAR mission has resulted in improved signal-to-noise spectra from the near-infrared spectrometer, contributing to the mineralogical analysis of the surface of (433) Eros. Wellnitz' thorough, detailed studies and his great patience are particularly appreciated by his colleagues. Name proposed by J. Veverka, based on a suggestion by L. A. McFadden. Citation by McFadden and M. F. A'Hearn.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19990728/MPCPages.arcLast Updated: 2010-06-11

[ hide close-approach data ]
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
1902-Sep-27 04:07 00:03 Jupiter 1.95695809730949 1.95695766789194 1.95695852672749 3.01734043825575 2.87031202941473 2416019.671332096 2.99978293079379 197.500019243283 17.4340567181296 85.0824590128775 3523712.24919375 T 38 CATAB v2.0f-lin.ifort 2020-May-20 02:14:56 2020-May-20 02:14
1949-Jun-01 01:14 00:02 Jupiter 1.96697560632985 1.9669752087358 1.9669760039239 3.508816475359 3.38386606104743 2433068.551498326 1.64859921109259 72.7976348220979 15.9775127611594 86.8257982871551 2751921.82451036 T 38 CATAB v2.0f-lin.ifort 2020-May-20 02:14:56 2020-May-20 02:14
2033-Sep-06 00:28 < 00:01 Jupiter 1.9725626528775 1.97256222880719 1.97256307694769 2.82346727713869 2.66705142342708 2463846.519165304 0.56496129463949 67.4251929946349 15.1679112939114 -86.9489084577444 3421253.47685817 T 38 CATAB v2.0f-lin.ifort 2020-May-20 02:14:56 2020-May-20 02:14
2080-May-01 10:54 00:02 Jupiter 1.95898333908082 1.95898293890652 1.958983739255 3.15334532000279 3.01310960040706 2480885.954317919 1.75567394098496 95.9733581600086 16.4777994997985 87.0953408998621 3217349.21161869 T 38 CATAB v2.0f-lin.ifort 2020-May-20 02:14:56 2020-May-20 02:14
2164-Aug-19 05:55 00:04 Jupiter 1.98560228625322 1.98560176993273 1.98560280257631 2.92949412984877 2.78006682170659 2511675.746759989 4.1226845606869 231.913740695848 15.7905114434655 -88.0393322970896 3455761.2441671 T 38 CATAB v2.0f-lin.ifort 2020-May-20 02:14:56 2020-May-20 02:14

Alternate Designations
 1991 NT1 = 1931 AF1 = 1950 TC3 = 1953 JP = 1961 WA = 1980 NG = 1982 YA3 = 1984 FG2 = 1989 EE8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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