Update for (1819) Laputa - May 13/14, 2003
Update computed by Jan Manek; issued 03 May 2003 23:27 +0200 (CEST)
Jan Manek's update
IOTA/IOTA-ES occultation update for
(1819) Laputa / TYC 1999-00105-1 on May 13/14, 2003
visible from twilight/sunlit areas only
Summary
In the night of May 13/14, 2003 a faint 10.0 mag star TYC 1999-00105-1
will be occulted by a 45 km asteroid (1819) Laputa. This update is based on
USNO/Flagstaff astrometry for the asteroid and recent UCAC star position.
The updated path shows ~8 path width north shift with time ~1.4 minute later compared to
Edwin Goffin's nominal prediction.
Updated path runs over twilight areas in north Norway, Sweden and Finland around 22:39 UT.
Most probably the occultation will not be observable.
Please check the path chart for details.
Clear sky and good luck !!!
The event at one glimpse:
* date and approx. UT time of event: May 13, 2003 @ 22:39 UT (Europe)
* magnitude of target star: 10.0
* magnitude drop [mag]: 4.9
* estimated maximum duration [s]: 4.7
* path description: given above
* Goffin's original chart reference: A03_0552
The occultation path:
* approximate ground width [km]: 60
* uncertainty [path widths]: 1.9
* uncertainty in time [s]: 20
* 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 1999-00105-1
* constellation: Bootes
* J2000 position [h,m,s; o,',"]: 13h 50m 52.0118s; +24o 46' 59.604"
* position source: recent UCAC position combined with Tycho-2 proper motion
* estimated accuracy ["]: 0.02" (0.01", 0.01")
* V mag [mag]: 10.02
* B-V [mag]: +0.56
* remarks:
Target star is in west Bootes, about 6.4 degrees north of 2.7 mag star eta Booti = SAO 100766 or
7.6' NW of 7.6 mag star SAO 83035.
!!! 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 GUIDE8):
* occulted star is in center - labeled with cross
* field is 3.0x3.0 degrees
* limiting magnitude is 12.5
* labeled stars have indicated SAO numbers
* remarks: Second chart shows 30' blowup to show correctly the star in field.
Data for the minor planet:
* general information:
number, name: (1819) Laputa
approx. diameter [km]: 59
* orbital information
orbit source: calculation Manek
source of used astrometry: USNO/Flagstaff (Ron Stone)
number of used observations: 90 USNO
number of rejected observations: 13 USNO
time covered by the observations: 1998 08 02 - 2003 04 30
rms residuals ["] (RA,DE): 0.12", 0.09"
estimated positional accuracy at epoch of event ["]: 0.11", 0.05"
remarks:
Data for the event:
* UT date and time of least geocentric approach: 22:42.8 UT
* approx. V mag of minor planet at event [mag]: 14.9
* geocentric parallax of minor planet ["]: 4.184
* magnitude drop [mag]: 4.9
* estimated maximum duration [s]: 4.7
* apparent motion of minor planet ["/h]: 22.53
* angular distance to moon, phase of moon [deg,%]: 31, 93%
* remarks:
Elements for WinOccult:
============ cut here ===========================================
2003 May 13
1819 Laputa
22h 42.8m UT
99-00105-1 10.0 13 50 52.012 24 46 59.60TYC 1999-00105-1
14.9 45 4.7 2.102 -1.580 -6.64
-4.258 24.786 -161.61 18.46
22.7133 -.18146 .59013 -5.14661 -1.58303 0.00206 -0.00367
2000 303.8028292003 511.00000166.782320122.29022823.885703 0.223036103.141303462.4406793910.25 0.15
RATE 1.7702690 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000
============ cut here ===========================================
Calculator(s): Jan Manek
Path coordinates:
Centre Star Star Sun Path Limits Error Limits
E. Longitude Latitude U.T. Alt Az Alt Limit 1 Limit 2 Limit 3 Limit 4
Latitude Latitude Latitude Latitude
...................................... shortened .............................................
o ' " o ' " h m s o o o o ' " o ' " o ' " o ' "
62 0 0 66 27 7 22 36 28 33 257 0 66 43 17 66 11 0 67 45 18 65 10 22
60 0 0 66 41 27 22 36 34 33 255 0 66 57 32 66 25 27 67 59 11 65 25 9
58 0 0 66 54 38 22 36 41 34 253 0 67 10 37 66 38 43 68 11 56 65 38 44
56 0 0 67 6 41 22 36 48 35 251 0 67 22 35 66 50 50 68 23 35 65 51 9
54 0 0 67 17 37 22 36 55 35 249 -1 67 33 26 67 1 50 68 34 9 66 2 26
52 0 0 67 27 28 22 37 1 36 247 -1 67 43 13 67 11 45 68 43 40 66 12 36
50 0 0 67 36 15 22 37 8 37 244 -1 67 51 57 67 20 36 68 52 10 66 21 40
48 0 0 67 44 0 22 37 15 37 242 -1 67 59 39 67 28 25 68 59 39 66 29 40
46 0 0 67 50 44 22 37 22 38 240 -2 68 6 20 67 35 11 69 6 9 66 36 37
44 0 0 67 56 27 22 37 29 38 238 -2 68 12 1 67 40 57 69 11 40 66 42 31
42 0 0 68 1 11 22 37 36 39 236 -2 68 16 43 67 45 42 69 16 15 66 47 24
40 0 0 68 4 56 22 37 43 39 234 -2 68 20 26 67 49 29 69 19 52 66 51 16
38 0 0 68 7 42 22 37 50 40 231 -2 68 23 11 67 52 16 69 22 33 66 54 7
36 0 0 68 9 31 22 37 57 41 229 -3 68 24 59 67 54 5 69 24 18 66 55 59
34 0 0 68 10 21 22 38 4 41 227 -3 68 25 50 67 54 57 69 25 8 66 56 51
32 0 0 68 10 15 22 38 11 42 224 -3 68 25 43 67 54 50 69 25 2 66 56 43
30 0 0 68 9 11 22 38 18 42 222 -3 68 24 39 67 53 45 69 24 0 66 55 36
28 0 0 68 7 9 22 38 26 43 220 -3 68 22 39 67 51 42 69 22 3 66 53 30
26 0 0 68 4 9 22 38 33 43 218 -3 68 19 40 67 48 41 69 19 11 66 50 23
24 0 0 68 0 11 22 38 41 44 215 -4 68 15 44 67 44 41 69 15 22 66 46 16
22 0 0 67 55 14 22 38 49 44 213 -4 68 10 50 67 39 42 69 10 36 66 41 9
20 0 0 67 49 18 22 38 56 45 210 -4 68 4 56 67 33 43 69 4 53 66 35 0
18 0 0 67 42 21 22 39 4 45 208 -4 67 58 3 67 26 43 68 58 12 66 27 49
16 0 0 67 34 24 22 39 12 46 206 -4 67 50 9 67 18 42 68 50 32 66 19 35
14 0 0 67 25 24 22 39 21 46 203 -4 67 41 13 67 9 39 68 41 51 66 10 17
12 0 0 67 15 21 22 39 29 46 201 -4 67 31 14 66 59 32 68 32 10 65 59 54
10 0 0 67 4 14 22 39 38 47 198 -4 67 20 11 66 48 19 68 21 25 65 48 25
8 0 0 66 52 0 22 39 46 47 196 -4 67 8 3 66 36 1 68 9 37 65 35 47
6 0 0 66 38 39 22 39 55 48 193 -4 66 54 47 66 22 34 67 56 42 65 22 1
4 0 0 66 24 8 22 40 4 48 190 -5 66 40 23 66 7 58 67 42 41 65 7 3
2 0 0 66 8 27 22 40 13 48 188 -5 66 24 47 65 52 10 67 27 30 64 50 53
0 0 0 65 51 32 22 40 23 49 185 -5 66 7 59 65 35 9 67 11 8 64 33 28
- 2 0 0 65 33 23 22 40 33 49 182 -5 65 49 57 65 16 53 66 53 32 64 14 46
- 4 0 0 65 13 56 22 40 43 49 180 -5 65 30 37 64 57 19 66 34 41 63 54 46
- 6 0 0 64 53 10 22 40 53 50 177 -5 65 9 58 64 36 25 66 14 32 63 33 25
- 8 0 0 64 31 1 22 41 3 50 174 -5 64 47 58 64 14 9 65 53 2 63 10 41
- 10 0 0 64 7 29 22 41 14 50 171 -5 64 24 34 63 50 29 65 30 9 62 46 32
- 12 0 0 63 42 30 22 41 25 51 168 -5 63 59 43 63 25 22 65 5 51 62 20 54
- 14 0 0 63 16 2 22 41 36 51 165 -4 63 33 23 62 58 45 64 40 4 61 53 47
- 16 0 0 62 48 1 22 41 48 51 162 -4 63 5 31 62 30 36 64 12 46 61 25 7
- 18 0 0 62 18 26 22 42 0 51 159 -4 62 36 5 62 0 53 63 43 55 60 54 52
- 20 0 0 61 47 14 22 42 12 51 156 -4 62 5 2 61 29 32 63 13 26 60 22 59
- 22 0 0 61 14 23 22 42 25 51 153 -4 61 32 19 60 56 32 62 41 18 59 49 27
- 24 0 0 60 39 49 22 42 37 52 150 -4 60 57 54 60 21 49 62 7 28 59 14 13
- 26 0 0 60 3 30 22 42 51 52 147 -4 60 21 44 59 45 22 61 31 53 58 37 14
- 28 0 0 59 25 25 22 43 4 52 144 -4 59 43 48 59 7 8 60 54 31 57 58 29
- 30 0 0 58 45 32 22 43 18 51 141 -3 59 4 3 58 27 6 60 15 19 57 17 57
- 32 0 0 58 3 47 22 43 33 51 137 -3 58 22 26 57 45 14 59 34 16 56 35 35
- 34 0 0 57 20 11 22 43 47 51 134 -3 57 38 58 57 1 30 58 51 19 55 51 22
- 36 0 0 56 34 42 22 44 3 51 131 -3 56 53 36 56 15 53 58 6 27 55 5 18
- 38 0 0 55 47 19 22 44 18 51 128 -2 56 6 21 55 28 23 57 19 40 54 17 22
- 40 0 0 54 58 1 22 44 34 50 125 -2 55 17 10 54 38 59 56 30 56 53 27 34
- 42 0 0 54 6 50 22 44 50 50 121 -1 54 26 5 53 47 42 55 40 15 52 35 55
- 44 0 0 53 13 46 22 45 6 49 118 -1 53 33 7 52 54 33 54 47 39 51 42 26
- 46 0 0 52 18 51 22 45 23 49 115 0 52 38 16 51 59 32 53 53 8 50 47 7
- 48 0 0 51 22 5 22 45 40 48 112 0 51 41 35 51 2 43 52 56 43 49 50 3
...................................... 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-|
--------------------------------------------------------------------U---U---
Be sure to use the RELOAD button of your browser,
so you will surely use the latest version of predictions page!
