Update for (1735) ITA - January 25/26, 2002
Update computed by Jan Manek; issued 22 Jan 2002 23:20:00 +0100 (CET)
Update computed by Jan Manek; issued 20 Jan 2002 22:00:00 +0100 (CET)
Jan Manek's update
IOTA/IOTA-ES occultation update for
(1735) ITA / TAC -03 09790 on January 25/26, 2002
visible from middle East and Europe
Summary
In the night of January 25/26, 2002 a faint 11.4 mag star TAC -03 09790
will be occulted by a 66 km asteroid (1735) ITA. This update is based on
USNO/Flagstaff astrometry for the asteroid and UCAC star position.
Usage of recent UCAC star position didn't changed the path location, uncertainty has lowered by factor of 2.
Only changed sections are given below. Other are available in the earlier update text.
Please check the path chart for details.
Good luck !
The occultation path:
* approximate ground width [km]: 70
* uncertainty [path widths]: 5.5
* uncertainty in time [s]: 60
* map: below
* remarks: Path uncertainities are given according to nominal star
position errors and expected asteroid positional accuracy.
Data for the target star:
* name: TAC -03 09790 = GSC 4960-00649 (non-star)
* constellation: Virgo
* J2000 position [h,m,s; o,',"]: 13h 07m 12.4796s; -03o 51' 38.368"
* position source: UCAC + TAC 1.0 proper motion
* estimated accuracy ["]: 0.02" (0.015", 0.015")
* V mag [mag]: 11.35
* B-V [mag]: +0.80
* remarks:
Recent UCAC position was provided by Marion and Norbert Zacharias.
Target star is in middle Virgo, 1.8 degrees north of 4.4 mag star theta Virgo =
= SAO 139189. Target star is brighter component of pair, fainter component is
15" distant at PA 26 degrees.
Calculator(s): Jan Manek
Path coordinates:
Latitude Latitude
Centre Altitude Path Limits
E. Longitude Latitude U.T. star sun Limit 1 Limit 2
........................... shortened .............................
o ' " o ' " h m s o o o ' " o ' "
Longitude Longitude
- 7 54 5 49 0 0 0 1 3 4 -59 - 10 36 49 - 5 37 58
- 1 25 19 48 0 0 0 1 11 8 -61 - 3 8 42 0 10 12
Latitude Latitude
- 1 0 0 47 55 13 0 1 11 9 -61 47 36 43 48 13 44
0 0 0 47 43 28 0 1 13 9 -61 47 24 53 48 2 3
1 0 0 47 31 5 0 1 15 10 -61 47 12 25 47 49 44
2 0 0 47 18 3 0 1 17 11 -61 46 59 19 47 36 47
3 0 0 47 4 22 0 1 20 12 -62 46 45 33 47 23 12
4 0 0 46 50 2 0 1 22 12 -62 46 31 7 47 8 56
5 0 0 46 35 1 0 1 25 13 -62 46 16 1 46 54 1
6 0 0 46 19 18 0 1 28 14 -62 46 0 12 46 38 24
7 0 0 46 2 54 0 1 31 15 -63 45 43 42 46 22 5
8 0 0 45 45 46 0 1 34 15 -63 45 26 28 46 5 4
9 0 0 45 27 54 0 1 38 16 -63 45 8 29 45 47 18
10 0 0 45 9 17 0 1 41 17 -63 44 49 46 45 28 48
11 0 0 44 49 55 0 1 45 18 -63 44 30 16 45 9 33
12 0 0 44 29 45 0 1 49 19 -63 44 9 59 44 49 30
13 0 0 44 8 47 0 1 54 19 -63 43 48 54 44 28 40
14 0 0 43 47 0 0 1 58 20 -63 43 26 60 44 7 1
15 0 0 43 24 23 0 2 3 21 -63 43 4 14 43 44 32
16 0 0 43 0 55 0 2 8 22 -63 42 40 37 43 21 12
17 0 0 42 36 33 0 2 14 23 -63 42 16 7 42 56 59
18 0 0 42 11 18 0 2 19 24 -63 41 50 43 42 31 52
19 0 0 41 45 7 0 2 25 24 -63 41 24 23 42 5 51
20 0 0 41 17 60 0 2 31 25 -63 40 57 6 41 38 53
21 0 0 40 49 54 0 2 38 26 -63 40 28 51 41 10 57
22 0 0 40 20 49 0 2 45 27 -63 39 59 36 40 42 2
23 0 0 39 50 43 0 2 52 28 -62 39 29 19 40 12 6
24 0 0 39 19 35 0 2 59 29 -62 38 58 0 39 41 8
25 0 0 38 47 22 0 3 7 30 -62 38 25 37 39 9 7
26 0 0 38 14 4 0 3 16 31 -62 37 52 7 38 35 60
27 0 0 37 39 39 0 3 24 32 -61 37 17 30 38 1 46
28 0 0 37 4 4 0 3 33 33 -61 36 41 45 37 26 24
29 0 0 36 27 20 0 3 43 34 -61 36 4 48 36 49 51
30 0 0 35 49 23 0 3 53 35 -60 35 26 39 36 12 7
31 0 0 35 10 13 0 4 3 36 -60 34 47 16 35 33 10
32 0 0 34 29 47 0 4 14 37 -59 34 6 37 34 52 57
33 0 0 33 48 5 0 4 25 38 -59 33 24 41 34 11 27
34 0 0 33 5 4 0 4 37 39 -58 32 41 27 33 28 40
35 0 0 32 20 42 0 4 49 41 -57 31 56 52 32 44 32
36 0 0 31 34 59 0 5 2 42 -57 31 10 55 31 59 3
37 0 0 30 47 53 0 5 16 43 -56 30 23 34 31 12 12
38 0 0 29 59 23 0 5 30 44 -55 29 34 50 30 23 56
39 0 0 29 9 27 0 5 44 45 -54 28 44 39 29 34 14
40 0 0 28 18 4 0 5 59 47 -54 27 53 2 28 43 6
41 0 0 27 25 14 0 6 15 48 -53 26 59 56 27 50 30
........................... shortened .............................
----------------------------------------------------------------------------
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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Jan Manek's update
IOTA/IOTA-ES occultation update for
(1735) ITA / TAC -03 09790 on January 25/26, 2002
visible from middle East and Europe
Summary
In the night of January 25/26, 2002 a faint 11.4 mag star TAC -03 09790
will be occulted by a 66 km asteroid (1735) ITA. This update is based on
USNO/Flagstaff astrometry for the asteroid and TAC star position.
The updated path shows ~0.4" south shift with time ~2.9 minutes later compared to
Edwin Goffin's nominal prediction.
Updated path runs over middle France around 0:01.3 UT, SW Switzerland ~0:01.5 UT,
north Italy ~0:01.6 UT, Albania and Greece 0:01.7 UT, SW coast of Turkey ~0:03.6 UT
and middle East around 0:05 UT. In fact uncertainty is rather large due to uncertain TAC
star position, which inaccuracy may be even larger than stated below, so in fact large
part of west, middle and SE Europe has some chance. Be careful, target star is south
component of close pair.
Please check the path chart for details.
Good luck !
The event at one glimpse:
* date and approx. UT time of event: January 26, 2002 @ 00:02 UT (Euro)
* magnitude of target star: 11.4
* magnitude drop [mag]: 3.6
* estimated maximum duration [s]: 9.9
* path description: given above
* Goffin's original chart reference: A02_0159
The occultation path:
* approximate ground width [km]: 70
* uncertainty [path widths]: 11
* uncertainty in time [s]: 120
* map: below
* remarks: Path uncertainities are given according to nominal star
position errors and expected asteroid positional accuracy.
Data for the target star:
* name: TAC -03 09790 = GSC 4960-00649 (non-star)
* constellation: Virgo
* J2000 position [h,m,s; o,',"]: 13h 07m 12.4790s; -03o 51' 38.390"
* position source: TAC 1.0
* estimated accuracy ["]: 0.35" (0.20", 0.20")
* V mag [mag]: 11.35
* B-V [mag]: +0.80
* remarks:
Target star is in middle Virgo, 1.8 degrees north of 4.4 mag star theta Virgo =
= SAO 139189. Target star is brighter component of pair, fainter component is
15" distant at PA 26 degrees. Positional accuracy is probably underestimated.
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
Data for the minor planet:
* general information:
number, name: (1735) ITA
approx. diameter [km]: 66
* orbital information
orbit source: calculation Manek
source of used astrometry: USNO/Flagstaff (Ron Stone)
number of used observations: 68 USNO
number of rejected observations: 1 USNO
time covered by the observations: 1998 09 19 - 2002 01 13
rms residuals ["] (RA,DE): 0.14", 0.15"
estimated positional accuracy at epoch of event ["]: 0.15", 0.15"
remarks:
Data for the event:
* UT date and time of least geocentric approach: 00:16.9 UT
* approx. V mag of minor planet at event [mag]: 15.0
* geocentric parallax of minor planet ["]: 3.186
* magnitude drop [mag]: 3.6
* estimated maximum duration [s]: 9.9
* apparent motion of minor planet ["/h]: 12.02
* angular distance to moon, phase of moon [deg,%]: 110, 89%
* remarks:
Calculator(s): Jan Manek
Path coordinates:
Latitude Latitude
Centre Altitude Path Limits
E. Longitude Latitude U.T. star sun Limit 1 Limit 2
........................... shortened .............................
o ' " o ' " h m s o o o ' " o ' "
1 0 0 47 54 51 0 1 18 10 -61 47 36 12 48 13 31
2 0 0 47 41 55 0 1 20 11 -61 47 23 11 48 0 39
3 0 0 47 28 20 0 1 23 12 -61 47 9 31 47 47 10
4 0 0 47 14 6 0 1 25 12 -62 46 55 11 47 33 1
5 0 0 46 59 11 0 1 28 13 -62 46 40 11 47 18 11
6 0 0 46 43 36 0 1 31 14 -62 46 24 30 47 2 41
7 0 0 46 27 18 0 1 34 14 -62 46 8 6 46 46 30
8 0 0 46 10 18 0 1 37 15 -62 45 50 60 46 29 36
9 0 0 45 52 34 0 1 40 16 -62 45 33 9 46 11 58
10 0 0 45 34 5 0 1 44 17 -63 45 14 34 45 53 36
11 0 0 45 14 51 0 1 48 18 -63 44 55 12 45 34 28
12 0 0 44 54 49 0 1 52 18 -63 44 35 4 45 14 35
13 0 0 44 34 1 0 1 56 19 -63 44 14 8 44 53 53
14 0 0 44 12 23 0 2 0 20 -63 43 52 23 44 32 24
15 0 0 43 49 56 0 2 5 21 -63 43 29 47 44 10 4
16 0 0 43 26 37 0 2 10 22 -63 43 6 20 43 46 54
17 0 0 43 2 26 0 2 16 22 -63 42 42 0 43 22 51
18 0 0 42 37 21 0 2 21 23 -63 42 16 47 42 57 55
19 0 0 42 11 21 0 2 27 24 -63 41 50 38 42 32 5
20 0 0 41 44 25 0 2 33 25 -63 41 23 32 42 5 18
21 0 0 41 16 32 0 2 39 26 -62 40 55 29 41 37 34
22 0 0 40 47 39 0 2 46 27 -62 40 26 26 41 8 51
23 0 0 40 17 45 0 2 53 28 -62 39 56 22 40 39 8
24 0 0 39 46 49 0 3 1 29 -62 39 25 15 40 8 23
25 0 0 39 14 50 0 3 9 30 -62 38 53 5 39 36 34
26 0 0 38 41 45 0 3 17 31 -61 38 19 49 39 3 41
27 0 0 38 7 34 0 3 25 32 -61 37 45 26 38 29 41
28 0 0 37 32 14 0 3 34 33 -61 37 9 54 37 54 33
29 0 0 36 55 44 0 3 43 34 -60 36 33 12 37 18 15
30 0 0 36 18 2 0 3 53 35 -60 35 55 18 36 40 46
31 0 0 35 39 7 0 4 3 36 -59 35 16 10 36 2 3
32 0 0 34 58 57 0 4 14 37 -59 34 35 47 35 22 6
33 0 0 34 17 30 0 4 25 38 -58 33 54 7 34 40 53
34 0 0 33 34 45 0 4 37 39 -58 33 11 9 33 58 21
35 0 0 32 50 41 0 4 49 40 -57 32 26 51 33 14 30
36 0 0 32 5 14 0 5 2 41 -57 31 41 10 32 29 18
37 0 0 31 18 26 0 5 15 43 -56 30 54 7 31 42 43
38 0 0 30 30 13 0 5 29 44 -55 30 5 40 30 54 44
39 0 0 29 40 34 0 5 43 45 -54 29 15 47 30 5 20
40 0 0 28 49 29 0 5 58 46 -54 28 24 27 29 14 30
41 0 0 27 56 56 0 6 14 48 -53 27 31 39 28 22 12
........................... shortened .............................
----------------------------------------------------------------------------
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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