Разделы

Updated Ephemerides of Minor Planets

Files “Updated Ephemerides of Minor Planets” (UEMP) comprise some part of the Tables now available in the Ephemerides of Minor Planets (EMP) published by the Institute of Applied Astronomy (IAA) on the yearly basis. As distinct from the printed version of EMP UEMP give corresponding information for all numbered minor planets as of date of the last (or last but one) batch of Minor Planet Circulars (MPC) issued by the Minor Planet Center.

readme.txt 16.011 description of Tables
elements of planets with numbers
elem01.txt 1140500 1 – 5000
elem02.txt 1140500 5001 – 10000
elem03.txt 1140500 10001 – 15000
elem04.txt 1140500 15001 – 20000
elem05.txt 1140500 20001 – 25000
elem06.txt 1140500 25001 – 30000
elem07.txt 1140500 30001 – 35000
elem08.txt 1140500 35001 – 40000
elem09.txt 1140500 40001 – 45000
elem10.txt 1140500 45001 – 50000
elem11.txt 1140500 50001 – 55000
elem12.txt 1140500 55001 – 60000
elem13.txt 1140500 60001 – 65000
elem14.txt 1140500 65001 – 70000
elem15.txt 1140500 70001 – 75000
elem16.txt 1140500 75001 – 80000
elem17.txt 1140500 80001 – 85000
elem18.txt 1140500 85001 – 90000
elem19.txt 1140500 90001 – 95000
elem20.txt 1140500 95001 – 100000
elem21.txt 1140500 100001 – 105000
elem22.txt 1140500 105001 – 110000
elem23.txt 1140500 110001 – 115000
elem24.txt 1140500 115001 – 120000
elem25.txt 1140500 120001 – 125000
elem26.txt 1140500 125001 – 130000
elem27.txt 1140500 130001 – 135000
elem28.txt 1140500 135001 – 140000
elem29.txt 1140500 140001 – 145000
elem30.txt 1140500 145001 – 150000
elem31.txt 1140500 150001 – 155000
elem32.txt 1140500 155001 – 160000
elem33.txt 1140500 160001 – 165000
elem34.txt 1140500 165001 – 170000
elem35.txt 1140500 170001 – 175000
elem36.txt 1140500 175001 – 180000
elem37.txt 1140500 180001 – 185000
elem38.txt 1140500 185001 – 190000
elem39.txt 1140500 190001 – 195000
elem40.txt 1140500 195001 – 200000
elem41.txt 1140500 200001 – 205000
elem42.txt 1140500 205001 – 210000
elem43.txt 1140500 210001 – 215000
elem44.txt 1140500 215001 – 220000
elem45.txt 1140500 220001 – 225000
elem46.txt 1140500 225001 – 230000
elem47.txt 1140500 230001 – 235000
elem48.txt 1140500 235001 – 240000
elem49.txt 1140500 240001 – 245000
elem50.txt 1140500 245001 – 250000
elem51.txt 1140500 250001 – 255000
elem52.txt 1140500 255001 – 260000
elem53.txt 1140500 260001 – 265000
elem54.txt 1140500 265001 – 270000
elem55.txt 1140500 270001 – 275000
elem56.txt 1140500 275001 – 280000
elem57.txt 1140500 280001 – 285000
elem58.txt 1140500 285001 – 290000
elem59.txt 1140500 290001 – 295000
elem60.txt 1140500 295001 – 300000
elem61.txt 1140500 300001 – 305000
elem62.txt 1140500 305001 – 310000
elem63.txt 1140500 310001 – 315000
elem64.txt 1140500 315001 – 320000
elem65.txt 1140500 320001 – 325000
elem66.txt 1140500 325001 – 330000
elem67.txt 1140500 330001 – 335000
elem68.txt 1140500 335001 – 340000
elem69.txt 1140500 340001 – 345000
elem70.txt 1140500 345001 – 350000
elem71.txt 1140500 350001 – 355000
elem72.txt 1140500 355001 – 360000
elem73.txt 1140500 360001 – 365000
elem74.txt 1140500 365001 – 370000
elem75.txt 1140500 370001 – 375000
elem76.txt 1140500 375001 – 380000
elem77.txt 1140500 380001 – 385000
elem78.txt 1140500 385001 – 390000
elem79.txt 1140500 390001 – 395000
elem80.txt 1140500 395001 – 400000
elem81.txt 1140500 400001 – 405000
elem82.txt 1140500 405001 – 410000
elem83.txt 1140500 410001 – 415000
elem84.txt 1140500 415001 – 420000
elem85.txt 1140500 420001 – 425000
elem86.txt 1140500 425001 – 430000
elem87.txt 1140500 430001 – 435000
elem88.txt 1140500 435001 – 440000
elem89.txt 1140500 440001 – 445000
elem90.txt 1140500 445001 – 450000
elem91.txt 1140500 450001 – 455000
elem92.txt 1140500 455001 – 460000
elem93.txt 1140500 460001 – 465000
elem94.txt 526724 465001 – 467308
opp.txt 14487.645 opposition dates in 2016 for planets with numbers 1 – 467308
ephemerides of minor planets
2016_05.eph 20101.771 May.1 - May.31.999, 2016
2016_06.eph 17063.671 Jun.1 - Jun.30.999, 2016
2016_07.eph 16211.896 Jul.1 - Jul.31.999, 2016

Description of Data

Elements

The files contain osculating elements of numbered minor planets with respect to the ecliptic plane and equinox J2000 for the standard epoch common for all minor planets. Set of data for each planet in general corresponds to those in EMP, but some additional information is also included.

The data for each planet are given in three successive lines. The first line contains:

  • minor planet number,
  • name or preliminary designation,
  • photometric parameters, H and G (the default value of the slope parameter G equal to 0.15 is indicated as X). epoch of elements (year, month, day) given for 0 hour TT; epoch is also given in JD.

The second line contains:

  • mean anomaly,
  • argument of perihelion,
  • longitude of ascending node,
  • inclination to the ecliptic plane,
  • eccentricity,
  • mean daily motion,
  • semimajor axis.

The angular elements are expressed in degrees, mean motion — in degree per day, and great semimajor axis in a.u.

The third line contains:

  • number of oppositions with observations used for improvement;
  • number of observations used for improvement;
  • the first and the last year of the time interval covered by the observations used for improvement;
  • mean-root-square residual with respect to set of elements fitted by least squares “uncertainty number” U (see Minor Planet Circular 24597,1995 Feb.15), if it is known;
  • perturbations taken into account when determining the initial set of elements and for subsequent numerical integration (M–N in the first three positions stands for perturbations from Mercury to Neptune, P in the fourth position stands for perturbations from Pluto, then c, p, v, e, h in the 5–9th positions stand for perturbations from Ceres, Pallas, Vesta, Eumonia, and Hygiea correspondingly; the 10th position is left for reserve; L in the 11th position means separate perturbations from the Earth and the Moon, R in the 12th positions means relativistics perturbations, 5 in the 13th position stands for DE405 coordinates of perturbing planets; blank in any position of the code means neglecting corresponding perturbations);
  • author of the elements;
  • reference to publication where initial set of elements was first published.

A Fortran format statement for reading a record for each planet is

format(i6,1x,a18,1x,a6,a6,3x,i4,1x,i2,1x,i2,3x,f9.1/
*7x,4f10.6,f10.8,f11.9,f12.8/
*6x,i4,i5,1x,a9,a5,1x,i1,1x,a13,1x,a23,a9)

Opposition dates

The opposition dates of the numbered minor planets within current year are represented also in tabular form. Apart from opposition date the apparent magnitude for the fourth ephemeris date is given for each planet. A dash indicates that there is no opposition within current year.

During 2016 minor planets with numbers 3360, 35396, 41429, 175921, 185851, 302831, 308635, 349068, 361538, 363814, 363831, 375054, 382758, 385343, 395207, 411165, 420591, 433953, 452376, 455148, 455795, 455956, 458062, 462959, 464797, 465616, 466508 have two oppositions each. The planet with numbers 154244 has three oppositions. For this planet corresponding information are given in several lines.

The column TE of the Table contains the year of the ephemeris volume in which the orbit was first introduced. A dash in this column indicates that elements of corresponding planet have never yet been published in EMP.

Ephemerides

Ephemerides of minor planets, arranged in order of opposition date, are given in the files 2016_05.eph, 2016_06.eph, and 2016_07.eph.

The following data are tabulated for each planet:

  1. The number and name or principal provisional designation of minor planet, the opposition date, the mean anomaly on the fourth ephemeris date, the minimum value of the phase angle and the date of its occurrence, the year of the most recent astrometric observation. In case the planet is on critical list (not observed during the nearest five years or observed in fewer than four oppositions) the year of the last astrometric observations is followed by symbol C. When it is known that rotational lightcurve variations exceed 0.4 mag, at least on occasion, the ephemeris header is ended in flag R. Where it is known or suspected that aspect variations cause large excursion (>0.4 mag) in the observed magnitude from opposition to opposition the flag A is used rather than R.
  2. Astrometric position (right ascension and declination) for 0 hour TT, referred to the equator and equinox of J2000.0, geocentric and heliocentric distances, the phase angle, and the apparent V magnitude are given for each of eight ephemeris dates, at 10-day interval.