MPEC 1998-Y22 : 1998 YM4
The following Minor Planet Electronic Circular may be linked-to from your own Web pages, but must not otherwise be redistributed electronically.A form allowing access to any MPEC is at the bottom of this page.
Read MPEC 1998-Y21
Read MPEC 1998-Y23
M.P.E.C. 1998-Y22 Issued 1998 Dec. 21, 15:42 UT
The Minor Planet Electronic Circulars contain information on unusual
minor planets and routine data on comets. They are published
on behalf of Commission 20 of the International Astronomical Union by the
Minor Planet Center, Smithsonian Astrophysical Observatory,
Cambridge, MA 02138, U.S.A.
BMARSDEN@CFA.HARVARD.EDU or GWILLIAMS@CFA.HARVARD.EDU
URL http://cfa-www.harvard.edu/iau/mpc.html
1998 YM4
Observations:
J98Y04M* C1998 12 19.62087 06 51 38.90 +42 02 20.2 17 V 385
J98Y04M IC1998 12 19.63234 06 51 30.47 +42 01 51.0 385
J98Y04M C1998 12 19.75294 06 50 08.40 +41 57 09.8 17.5 V 888
J98Y04M C1998 12 19.76464 06 50 00.62 +41 56 40.8 888
J98Y04M C1998 12 19.77304 06 49 54.82 +41 56 21.1 888
J98Y04M C1998 12 19.81609 06 49 26.11 +41 54 36.6 888
J98Y04M C1998 12 19.82385 06 49 20.97 +41 54 17.4 888
J98Y04M C1998 12 19.90972 06 48 29.34 +41 50 57.9 587
J98Y04M C1998 12 19.91250 06 48 27.52 +41 50 52.6 587
J98Y04M C1998 12 19.91262 06 48 27.23 +41 50 50.6 17.5 V 046
J98Y04M C1998 12 19.91578 06 48 25.08 +41 50 43.9 046
J98Y04M C1998 12 19.91632 06 48 24.96 +41 50 43.9 17.0 R 587
J98Y04M C1998 12 19.91693 06 48 24.38 +41 50 41.1 046
J98Y04M C1998 12 19.91756 06 48 23.84 +41 50 38.5 046
J98Y04M C1998 12 19.92280 06 48 20.42 +41 50 27.7 046
J98Y04M C1998 12 19.92354 06 48 19.98 +41 50 25.5 046
J98Y04M C1998 12 19.92422 06 48 19.48 +41 50 24.4 17.6 V 046
J98Y04M C1998 12 20.06931 06 46 44.25 +41 44 46.0 557
J98Y04M C1998 12 20.07019 06 46 43.66 +41 44 43.8 557
J98Y04M C1998 12 20.07107 06 46 43.08 +41 44 41.9 557
J98Y04M C1998 12 20.07195 06 46 42.51 +41 44 39.5 17.8 V 557
J98Y04M C1998 12 20.43296 06 43 01.45 +41 30 30.9 411
J98Y04M C1998 12 20.44820 06 42 52.22 +41 29 57.9 411
J98Y04M C1998 12 20.45159 06 42 50.03 +41 29 49.7 411
J98Y04M C1998 12 20.49325 06 42 24.13 +41 28 17.1 17.7 V 897
J98Y04M C1998 12 20.50294 06 42 18.55 +41 27 57.3 897
J98Y04M C1998 12 20.50902 06 42 14.82 +41 27 43.7 897
J98Y04M C1998 12 20.51375 06 42 11.77 +41 27 32.6 897
J98Y04M C1998 12 20.51788 06 42 09.19 +41 27 22.5 897
J98Y04M C1998 12 20.52367 06 42 05.90 +41 27 10.6 18.0 V 897
J98Y04M C1998 12 20.55399 06 41 46.98 +41 26 02.4 355
J98Y04M C1998 12 20.55699 06 41 45.17 +41 25 56.6 355
J98Y04M C1998 12 20.59716 06 41 20.41 +41 24 22.9 18.0 V 908
J98Y04M C1998 12 20.60017 06 41 18.58 +41 24 15.9 908
J98Y04M C1998 12 20.60365 06 41 16.43 +41 24 08.5 908
J98Y04M C1998 12 20.62969 06 41 00.60 +41 23 10.0 17.7 V 360
J98Y04M C1998 12 20.63247 06 40 58.88 +41 23 03.8 360
J98Y04M C1998 12 20.63524 06 40 57.19 +41 22 57.3 360
J98Y04M C1998 12 21.05988 06 36 48.43 +41 06 10.8 557
J98Y04M C1998 12 21.06176 06 36 47.30 +41 06 06.2 557
J98Y04M C1998 12 21.06270 06 36 46.76 +41 06 04.1 557
J98Y04M C1998 12 21.49446 06 32 50.71 +40 49 18.9 17.5 V 867
J98Y04M C1998 12 21.49862 06 32 48.43 +40 49 09.9 867
J98Y04M C1998 12 21.50642 06 32 43.93 +40 48 54.1 17.7 V 385
J98Y04M C1998 12 21.50661 06 32 43.96 +40 48 51.8 867
J98Y04M C1998 12 21.52270 06 32 35.05 +40 48 18.1 385
J98Y04M C1998 12 21.53226 06 32 29.63 +40 47 56.7 385
Observer details:
046 Klet. Observers J. Ticha, M. Tichy. Measurer M. Tichy. 0.57-m f/5.2
reflector + CCD.
355 Hadano. Observer A. Asami. 0.28-m f/5.0 reflector + CCD.
360 Kuma Kogen. Observer A. Nakamura. 0.60-m f/6.0 Ritchey-Chretien + CCD.
385 Nihondaira. Observer T. Urata. 0.31-m f/4.7 reflector + CCD.
411 Oizumi. Observer T. Kobayashi. 0.41-m f/4.3 reflector + CCD.
557 Ondrejov. Observers L. Sarounova, A. Kolar. 0.65-m f/3.6 reflector
+ CCD.
587 Sormano. Observer M. Cavagna. 0.5-m reflector + CCD.
867 Saji Observatory. Observers M. Yamanishi, A. Miyamoto, M. Aimoto,
T. Oribe. 1.03-m f/4.8 reflector + CCD.
888 Gekko Observatory. Observer T. Kagawa. 0.50-m f/4.0 reflector + CCD.
897 Chiyoda. Observer T. Kojima. 0.25-m f/6.0 reflector + CCD.
908 Toyama. Observer M. Aoki. 0.43-m f/6 reflector + CCD.
Orbital elements:
1998 YM4 PHA 0.046
Epoch 1998 Dec. 13.0 TT = JDT 2451160.5 Williams
M 30.50189 (2000.0) P Q
n 0.55064276 Peri. 344.07818 +0.83215526 +0.55424281
a 1.4741989 Node 342.22715 -0.50204181 +0.73899774
e 0.7187162 Incl. 3.42494 -0.23552420 +0.38301078
P 1.79 H 19.8 G 0.15
From 44 observations 1998 Dec. 19-21.
Ephemeris:
1998 YM4 a,e,i = 1.47, 0.72, 3 q = 0.4147
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
1998 12 13 08 40.44 +44 36.1 0.149 1.093 134.1 40.3 17.4
1998 12 18 07 11.52 +43 02.8 0.190 1.156 153.0 22.7 17.6
1998 12 23 06 20.31 +39 51.8 0.242 1.217 163.2 13.5 17.9
1998 12 28 05 50.77 +37 00.1 0.301 1.276 164.3 12.0 18.4
1999 01 02 05 33.06 +34 44.0 0.366 1.333 159.8 14.8 19.1
1999 01 07 05 22.25 +32 58.6 0.435 1.388 153.9 18.1 19.6
1999 01 12 05 15.82 +31 36.6 0.508 1.441 148.1 21.1 20.2
1999 01 17 05 12.40 +30 32.3 0.585 1.492 142.6 23.6 20.6
1999 01 22 05 11.14 +29 41.4 0.665 1.541 137.4 25.6 21.0
1999 01 27 05 11.53 +29 00.9 0.748 1.589 132.5 27.2 21.4
1999 02 01 05 13.17 +28 28.3 0.834 1.635 127.8 28.4 21.7
1999 02 06 05 15.81 +28 01.9 0.922 1.680 123.3 29.4 22.0
1999 02 11 05 19.25 +27 40.2 1.012 1.723 119.0 30.1 22.3
Gareth V. Williams (C) Copyright 1998 MPC M.P.E.C. 1998-Y22
Read MPEC 1998-Y21
Read MPEC 1998-Y23
Enter an MPEC number in one of the following forms:
- 1997-B01 (the full form)
- J97B01 (the packed version of the full form)
- B01 (the abbreviated form)