Update for (1165) Imprinetta - May 2/3, 2002
Update computed by Jan Manek; issued 25 Apr 2002 21:45:00 +0100 (CEST)
Jan Manek's update
IOTA/IOTA-ES occultation update for
(1165) Imprinetta / HIP 70302 = SAO 139906 on May 2/3, 2002
visible from India and Russia
Summary
In the night of May 2/3, 2002 a 9.8 mag star HIP 70302 = SAO 139906
will be occulted by a 55 km asteroid (1165) Imprinetta. This update is based on
USNO/Flagstaff and TMO astrometry for the asteroid and combined Tycho-2/HIP star position.
The updated path shows ~2 path width east shift with time ~0.1 minutes earlier compared to
Edwin Goffin's nominal prediction.
Updated path runs over India around 21:52 UT with Nagpur in path and Ahmadabad very close to path.
Later after passing over Caspic sea path runs over Russia, south of Volgograd ~21:57.5 UT,
just southwest of Moscow ~21:58.4 UT and just northeast of St.Petersburg ~21:59.0 UT.
Please check the path chart for details.
The brightness drop will be only ~2.5 magnitudes if the double star will not be resolved
in the used telescope (instead of the stated 4.5 mags), but this is still enough for visual
observation.
Clear sky and good luck !!!
The event at one glimpse:
* date and approx. UT time of event: May 2, 2002 @ 21:52 UT (India)
21:58 UT (Russia)
* magnitude of target star: 9.8
* magnitude drop [mag]: 4.5
* estimated maximum duration [s]: 4.5
* path description: given above
* Goffin's original chart reference: A02_0549
The occultation path:
* approximate ground width [km]: 90
* uncertainty [path widths]: 3.1
* uncertainty in time [s]: 15
* map: below
* remarks: Path uncertainties are given according to nominal star
position errors and expected asteroid positional accuracy.
Data for the target star:
* name: SAO 139905 = PPM 197494 = HIP 70302 A
* constellation: Libra
* J2000 position [h,m,s; o,',"]: 14h 23m 02.9610s; -08o 56' 40.816"
* position source: Weighted mean of HIP and Tycho-2 position
* estimated accuracy ["]: 0.04" (0.025", 0.025")
* V mag [mag]: 9.76
* B-V [mag]: +0.65
* remarks:
Target star is in northwest Libra, about 2.8 degrees NE of 4.2 mag star kappa Scorpii = SAO 158427.
Target star is brighter component of double star, fainter one has 12.5 mag, at PA=279 and 8" distance.
Star position quality is slightly degraded by this.
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.
Close finding chart (prepared in GUIDE7):
* occulted star is in center - labeled with cross
* field is 3.0x3.0 degrees
* limiting magnitude is 13.5
* labeled stars have indicated SAO numbers
* remarks:
Data for the minor planet:
* general information:
number, name: (1165) Imprinetta
approx. diameter [km]: 55
* orbital information
orbit source: calculation Manek
source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen)
number of used observations: 91 USNO, 4 TMO
number of rejected observations: 3 USNO
time covered by the observations: 1998 09 07 - 2002 04 23
rms residuals ["] (RA,DE): 0.14", 0.17"
estimated positional accuracy at epoch of event ["]: 0.10", 0.10"
remarks:
Data for the event:
* UT date and time of least geocentric approach: 21:54.8 UT
* approx. V mag of minor planet at event [mag]: 14.3
* geocentric parallax of minor planet ["]: 4.616
* magnitude drop [mag]: 4.5
* estimated maximum duration [s]: 4.5
* apparent motion of minor planet ["/h]: 33.49
* angular distance to moon, phase of moon [deg,%]: 80, 64%
* remarks:
Calculator(s): Jan Manek
Path coordinates:
Latitude Latitude
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 ' "
108 0 0 15 27 34 21 49 51 7 -9 15 52 2 15 3 20
107 0 0 15 25 37 21 49 53 8 -10 15 50 3 15 1 23
106 0 0 15 24 38 21 49 54 9 -10 15 49 3 15 0 26
105 0 0 15 24 37 21 49 57 10 -11 15 49 2 15 0 26
104 0 0 15 25 35 21 49 59 11 -12 15 49 59 15 1 24
103 0 0 15 27 31 21 50 2 12 -13 15 51 56 15 3 20
102 0 0 15 30 25 21 50 4 12 -14 15 54 50 15 6 13
101 0 0 15 34 17 21 50 7 13 -15 15 58 43 15 10 4
100 0 0 15 39 7 21 50 11 14 -16 16 3 34 15 14 52
99 0 0 15 44 54 21 50 14 15 -17 16 9 24 15 20 38
98 0 0 15 51 40 21 50 18 16 -17 16 16 11 15 27 21
97 0 0 15 59 23 21 50 21 17 -18 16 23 57 15 35 2
96 0 0 16 8 3 21 50 25 18 -19 16 32 41 15 43 39
95 0 0 16 17 42 21 50 30 19 -20 16 42 23 15 53 14
94 0 0 16 28 18 21 50 34 20 -21 16 53 4 16 3 47
93 0 0 16 39 53 21 50 39 20 -21 17 4 42 16 15 17
92 0 0 16 52 25 21 50 44 21 -22 17 17 20 16 27 44
91 0 0 17 5 55 21 50 49 22 -23 17 30 55 16 41 9
90 0 0 17 20 23 21 50 54 23 -24 17 45 29 16 55 32
89 0 0 17 35 50 21 50 59 24 -24 18 1 2 17 10 52
88 0 0 17 52 14 21 51 5 24 -25 18 17 33 17 27 10
87 0 0 18 9 38 21 51 10 25 -26 18 35 4 17 44 26
86 0 0 18 27 59 21 51 16 26 -26 18 53 33 18 2 41
85 0 0 18 47 20 21 51 23 27 -27 19 13 2 18 21 53
84 0 0 19 7 40 21 51 29 27 -28 19 33 31 18 42 5
83 0 0 19 28 59 21 51 35 28 -28 19 54 59 19 3 14
82 0 0 19 51 17 21 51 42 29 -29 20 17 27 19 25 23
81 0 0 20 14 35 21 51 49 30 -30 20 40 55 19 48 31
80 0 0 20 38 52 21 51 56 30 -30 21 5 24 20 12 38
79 0 0 21 4 10 21 52 3 31 -31 21 30 53 20 37 44
78 0 0 21 30 28 21 52 10 32 -31 21 57 23 21 3 50
77 0 0 21 57 46 21 52 18 32 -32 22 24 55 21 30 56
76 0 0 22 26 6 21 52 25 33 -32 22 53 27 21 59 3
75 0 0 22 55 26 21 52 33 33 -32 23 23 2 22 28 9
74 0 0 23 25 47 21 52 41 34 -33 23 53 38 22 58 16
73 0 0 23 57 10 21 52 49 34 -33 24 25 17 23 29 24
72 0 0 24 29 35 21 52 58 35 -33 24 57 58 24 1 33
71 0 0 25 3 2 21 53 6 35 -34 25 31 42 24 34 44
70 0 0 25 37 31 21 53 15 36 -34 26 6 29 25 8 55
69 0 0 26 13 3 21 53 23 36 -34 26 42 19 25 44 9
68 0 0 26 49 37 21 53 32 36 -34 27 19 13 26 20 24
67 0 0 27 27 14 21 53 41 37 -35 27 57 11 26 57 42
66 0 0 28 5 55 21 53 50 37 -35 28 36 13 27 36 1
65 0 0 28 45 39 21 53 59 37 -35 29 16 20 28 15 24
64 0 0 29 26 26 21 54 8 37 -35 29 57 31 28 55 48
63 0 0 30 8 17 21 54 18 38 -35 30 39 47 29 37 16
62 0 0 30 51 12 21 54 27 38 -35 31 23 8 30 19 46
61 0 0 31 35 11 21 54 37 38 -35 32 7 35 31 3 19
60 0 0 32 20 15 21 54 46 38 -35 32 53 7 31 47 55
59 0 0 33 6 22 21 54 56 38 -34 33 39 44 32 33 34
58 0 0 33 53 34 21 55 6 38 -34 34 27 28 33 20 15
57 0 0 34 41 50 21 55 15 38 -34 35 16 17 34 7 60
56 0 0 35 31 10 21 55 25 38 -34 36 6 12 34 56 47
55 0 0 36 21 34 21 55 35 37 -33 36 57 13 35 46 37
54 0 0 37 13 3 21 55 45 37 -33 37 49 20 36 37 29
53 0 0 38 5 35 21 55 55 37 -32 38 42 33 37 29 23
52 0 0 38 59 11 21 56 4 36 -32 39 36 51 38 22 19
51 0 0 39 53 50 21 56 14 36 -31 40 32 16 39 16 16
50 0 0 40 49 32 21 56 24 36 -31 41 28 45 40 11 14
49 0 0 41 46 17 21 56 34 35 -30 42 26 20 41 7 12
48 0 0 42 44 3 21 56 43 35 -30 43 24 59 42 4 10
47 0 0 43 42 51 21 56 53 34 -29 44 24 43 43 2 6
46 0 0 44 42 40 21 57 2 33 -28 45 25 31 44 1 0
45 0 0 45 43 28 21 57 12 33 -27 46 27 21 45 0 51
44 0 0 46 45 15 21 57 21 32 -27 47 30 15 46 1 38
43 0 0 47 47 60 21 57 30 31 -26 48 34 10 47 3 18
42 0 0 48 51 41 21 57 39 31 -25 49 39 5 48 5 52
41 0 0 49 56 16 21 57 48 30 -24 50 45 1 49 9 16
40 0 0 51 1 45 21 57 57 29 -23 51 51 54 50 13 30
39 0 0 52 8 6 21 58 5 28 -22 52 59 44 51 18 30
38 0 0 53 15 15 21 58 13 27 -21 54 8 30 52 24 15
37 0 0 54 23 12 21 58 21 26 -20 55 18 9 53 30 42
36 0 0 55 31 52 21 58 29 25 -19 56 28 39 54 37 47
35 0 0 56 41 14 21 58 36 24 -18 57 39 57 55 45 28
34 0 0 57 51 13 21 58 44 23 -17 58 52 2 56 53 40
33 0 0 59 1 45 21 58 51 22 -16 60 4 49 58 2 19
32 0 0 60 12 47 21 58 57 21 -14 61 18 15 59 11 21
31 0 0 61 24 14 21 59 3 20 -13 62 32 16 60 20 41
30 0 0 62 35 59 21 59 9 18 -12 63 46 48 61 30 11
29 0 0 63 47 56 21 59 15 17 -11 65 1 43 62 39 47
28 0 0 64 59 58 21 59 20 16 -10 66 16 57 63 49 19
27 0 0 66 11 58 21 59 25 15 -8 67 32 21 64 58 42
26 0 0 67 23 45 21 59 29 14 -7 68 47 48 66 7 45
25 0 0 68 35 9 21 59 33 13 -6 70 3 6 67 16 18
........................... 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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