Update for (173) Ino - February 6/7, 2003
Update computed by Jan Manek; issued 29 Jan 2003 22:28 +0100 (CET)
Jan Manek's update
IOTA/IOTA-ES occultation update for
(173) Ino / TYC 4990-00676-1 on February 6/7, 2003
visible from N Egypt, middle East, Iraq, Iran, middle Asia and Siberia
Summary
In the night of February 6/7, 2003 a faint 11.3 mag star TYC 4990-00676-1
will be occulted by a 159 km asteroid (173) Ino. This update is based on
USNO/Flagstaff astrometry for the asteroid and recent UCAC star position.
The updated path shows ~0.5 path width north shift with time 1.4 minutes later compared to
Edwin Goffin's nominal prediction.
Updated path runs over N Egypt ~23:32.8 UT, middle East around 23:33.3 UT, Iraq ~23:34.0 UT,
Iran ~23:35 UT, middle Asia 23:36-23:39 UT and Siberia ~23:40 UT.
Please check the path chart for details.
Clear sky and good luck !!!
The event at one glimpse:
* date and approx. UT time of event: February 6, 2003 @ 23:33 UT (middle East)
* magnitude of target star: 11.3
* magnitude drop [mag]: 2.6
* estimated maximum duration [s]: 12.4
* path description: given above
* Goffin's original chart reference: A03_0213
The occultation path:
* approximate ground width [km]: 250
* uncertainty [path widths]: 0.7
* uncertainty in time [s]: 8
* map: below
* remarks: Path uncertainties are given according to nominal star
position errors and expected asteroid positional accuracy.
Data for the target star:
* name: TYC 4990-00676-1
* constellation: Virgo
* J2000 position [h,m,s; o,',"]: 14h 46m 27.6691s; -02o 47' 02.357"
* position source: recent UCAC position combined with Tycho-2 proper motion
* estimated accuracy ["]: 0.03" (0.01", 0.03")
* V mag [mag]: 11.30
* B-V [mag]: +1.42
* remarks:
Target star is in east Virgo, about 3.0 degrees north of 3.9 mag star mu Virginis = SAO 140090 or
1.2 degrees WSW of 4.9 mag star 11 Librae = SAO 140176.
!!! IMPORTANT !!!
Purple stars in identification chart are so called 'non-star' objects in GSC; in dense fields
the 'non-stars' are often real stars or blends of close pairs. Be careful about this.
Close finding chart (prepared in GUIDE7):
* occulted star is in center - labeled with cross
* field is 3.0x3.0 degrees
* limiting magnitude is 13.0
* labeled stars have indicated SAO numbers
* remarks:
Data for the minor planet:
* general information:
number, name: (173) Ino
approx. diameter [km]: 159
* orbital information
orbit source: calculation Manek
source of used astrometry: USNO/Flagstaff (Ron Stone)
number of used observations: 95 USNO
number of rejected observations: 13 USNO
time covered by the observations: 1998 02 26 - 2002 04 12
rms residuals ["] (RA,DE): 0.06", 0.06"
estimated positional accuracy at epoch of event ["]: 0.04", 0.04"
remarks:
Data for the event:
* UT date and time of least geocentric approach: 23:37.3 UT
* approx. V mag of minor planet at event [mag]: 13.8
* geocentric parallax of minor planet ["]: 2.901
* magnitude drop [mag]: 2.6
* estimated maximum duration [s]: 12.4
* apparent motion of minor planet ["/h]: 21.03
* angular distance to moon, phase of moon [deg,%]: 159, 28%
* remarks:
Elements for WinOccult:
============ cut here ===========================================
2003 Feb 06
173 Ino
23h 37.3m UT
90-00676-1 11.3 14 46 27.669- 2 47 2.36TYC 4990-00676-1
13.8 159 12.4 3.031 1.325 6.92
90.608 -2.785 189.21 -15.50
23.6211 -.24549 .70909 6.84340 2.38184 -0.00576 0.00165
2000 188.5366572003 131.00000228.234520148.36568514.207011 0.208400532.741415862.170103357.665 0.01
RATE 2.1714090 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000
============ cut here ===========================================
Calculator(s): Jan Manek
Path coordinates:
Center Altitude Path Limits
E. Longitude Latitude U.T. star sun Limit 1 Limit 2
........................... shortened .............................
o ' " o ' " h m s o o o ' " o ' "
Latitude Latitude
10 0 0 29 27 26 23 31 51 6 -76 28 22 44 30 33 32
12 0 0 29 28 23 23 31 54 7 -76 28 23 39 30 34 31
14 0 0 29 31 12 23 31 57 9 -76 28 26 24 30 37 24
16 0 0 29 35 53 23 32 1 11 -75 28 31 2 30 42 11
18 0 0 29 42 28 23 32 6 12 -74 28 37 30 30 48 51
20 0 0 29 50 55 23 32 11 14 -73 28 45 51 30 57 26
22 0 0 30 1 15 23 32 17 16 -72 28 56 2 31 7 54
24 0 0 30 13 27 23 32 24 18 -71 29 8 5 31 20 16
26 0 0 30 27 31 23 32 31 19 -69 29 21 58 31 34 31
28 0 0 30 43 25 23 32 39 21 -68 29 37 42 31 50 38
30 0 0 31 1 10 23 32 48 22 -66 29 55 14 32 8 36
32 0 0 31 20 44 23 32 57 24 -65 30 14 34 32 28 24
34 0 0 31 42 5 23 33 7 25 -63 30 35 41 32 50 1
36 0 0 32 5 13 23 33 17 27 -61 30 58 33 33 13 26
38 0 0 32 30 5 23 33 28 28 -60 31 23 9 33 38 35
40 0 0 32 56 39 23 33 39 30 -58 31 49 26 34 5 28
42 0 0 33 24 54 23 33 51 31 -56 32 17 22 34 34 2
44 0 0 33 54 46 23 34 3 32 -54 32 46 55 35 4 14
46 0 0 34 26 13 23 34 16 33 -53 33 18 3 35 36 2
48 0 0 34 59 11 23 34 29 35 -51 33 50 41 36 9 22
50 0 0 35 33 38 23 34 42 36 -49 34 24 47 36 44 11
52 0 0 36 9 29 23 34 56 37 -47 35 0 17 37 20 25
54 0 0 36 46 41 23 35 10 38 -45 35 37 7 37 57 59
56 0 0 37 25 9 23 35 25 38 -44 36 15 14 38 36 51
58 0 0 38 4 49 23 35 39 39 -42 36 54 32 39 16 54
60 0 0 38 45 36 23 35 54 40 -40 37 34 57 39 58 4
62 0 0 39 27 24 23 36 8 40 -38 38 16 25 40 40 16
64 0 0 40 10 10 23 36 23 41 -37 38 58 49 41 23 24
66 0 0 40 53 46 23 36 38 41 -35 39 42 5 42 7 23
68 0 0 41 38 8 23 36 53 41 -33 40 26 6 42 52 7
70 0 0 42 23 9 23 37 8 41 -32 41 10 48 43 37 29
72 0 0 43 8 43 23 37 22 41 -30 41 56 3 44 23 24
74 0 0 43 54 45 23 37 37 41 -29 42 41 47 45 9 44
76 0 0 44 41 7 23 37 51 41 -27 43 27 53 45 56 25
78 0 0 45 27 44 23 38 5 41 -26 44 14 14 46 43 18
80 0 0 46 14 28 23 38 19 40 -24 45 0 45 47 30 18
82 0 0 47 1 15 23 38 33 40 -23 45 47 19 48 17 19
84 0 0 47 47 58 23 38 46 39 -21 46 33 50 49 4 14
86 0 0 48 34 30 23 38 59 39 -20 47 20 13 49 50 57
88 0 0 49 20 46 23 39 12 38 -19 48 6 21 50 37 21
90 0 0 50 6 41 23 39 24 37 -17 48 52 10 51 23 22
92 0 0 50 52 8 23 39 36 36 -16 49 37 33 52 8 54
94 0 0 51 37 2 23 39 48 36 -15 50 22 25 52 53 51
96 0 0 52 21 20 23 39 59 35 -14 51 6 42 53 38 9
98 0 0 53 4 56 23 40 10 34 -13 51 50 19 54 21 44
100 0 0 53 47 45 23 40 20 33 -11 52 33 12 55 4 30
102 0 0 54 29 45 23 40 30 32 -10 53 15 17 55 46 24
104 0 0 55 10 52 23 40 39 31 -9 53 56 30 56 27 24
106 0 0 55 51 2 23 40 48 30 -8 54 36 49 57 7 25
108 0 0 56 30 13 23 40 56 29 -8 55 16 11 57 46 25
110 0 0 57 8 23 23 41 4 28 -7 55 54 32 58 24 22
112 0 0 57 45 29 23 41 12 27 -6 56 31 52 59 1 14
114 0 0 58 21 31 23 41 19 26 -5 57 8 8 59 36 60
........................... shortened .............................
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Jan Manek
Stefanik Observatory Private :
Petrin 205 Werichova 950
118 46 Praha 1 152 00 Praha 5 - Barrandov |_|_|
Czech Republic Czech Republic / \
Internet : jan.manek@worldonline.cz |-O-O-|
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