Path coordinates:
Altitude
E. Longitude Latitude U.T. star sun
+ 45 00 00 + 26 22 43 1 29 29 24 -30
+ 43 00 00 + 27 16 24 1 29 39 26 -32
+ 41 00 00 + 28 09 54 1 29 50 28 -34
+ 39 00 00 + 29 03 09 1 30 01 30 -35
+ 37 00 00 + 29 56 03 1 30 13 31 -37
+ 35 00 00 + 30 48 31 1 30 25 33 -39
+ 33 00 00 + 31 40 29 1 30 38 35 -40
+ 31 00 00 + 32 31 52 1 30 51 37 -42
+ 29 00 00 + 33 22 35 1 31 04 38 -43
+ 27 00 00 + 34 12 34 1 31 18 40 -45
+ 25 00 00 + 35 01 46 1 31 32 41 -46
+ 23 00 00 + 35 50 06 1 31 47 43 -47
+ 21 00 00 + 36 37 31 1 32 02 45 -49
+ 19 00 00 + 37 23 59 1 32 16 46 -50
+ 17 00 00 + 38 09 26 1 32 32 47 -51
+ 15 00 00 + 38 53 50 1 32 47 49 -52
+ 13 00 00 + 39 37 09 1 33 02 50 -53
+ 11 00 00 + 40 19 20 1 33 17 51 -54
+ 9 00 00 + 41 00 21 1 33 33 52 -55
+ 7 00 00 + 41 40 12 1 33 48 54 -55
+ 5 00 00 + 42 18 50 1 34 04 55 -56
+ 3 00 00 + 42 56 16 1 34 19 56 -56
+ 1 00 00 + 43 32 27 1 34 35 57 -57
- 1 00 00 + 44 07 23 1 34 50 57 -57
- 3 00 00 + 44 41 03 1 35 05 58 -58
- 5 00 00 + 45 13 28 1 35 21 59 -58
- 7 00 00 + 45 44 37 1 35 36 60 -58
- 9 00 00 + 46 14 30 1 35 51 60 -58
- 11 00 00 + 46 43 07 1 36 06 61 -58
- 13 00 00 + 47 10 27 1 36 21 61 -58
- 15 00 00 + 47 36 32 1 36 35 61 -58
- 17 00 00 + 48 01 22 1 36 50 62 -58
- 19 00 00 + 48 24 56 1 37 04 62 -57
- 21 00 00 + 48 47 16 1 37 18 62 -57
........... ocean part cutted out ...........
- 47 00 00 + 51 48 07 1 40 11 57 -49
- 49 00 00 + 51 53 53 1 40 23 57 -48
- 51 00 00 + 51 58 30 1 40 35 56 -47
- 53 00 00 + 52 02 00 1 40 47 55 -46
- 55 00 00 + 52 04 22 1 40 59 54 -45
- 57 00 00 + 52 05 35 1 41 11 53 -44
- 59 00 00 + 52 05 41 1 41 22 53 -43
- 61 00 00 + 52 04 39 1 41 34 52 -42
- 63 00 00 + 52 02 30 1 41 45 51 -41
- 65 00 00 + 51 59 12 1 41 57 50 -40
- 67 00 00 + 51 54 45 1 42 08 49 -39
- 69 00 00 + 51 49 11 1 42 19 48 -38
- 71 00 00 + 51 42 27 1 42 29 47 -37
- 73 00 00 + 51 34 34 1 42 40 46 -36
- 75 00 00 + 51 25 31 1 42 51 45 -35
- 77 00 00 + 51 15 18 1 43 01 44 -34
- 79 00 00 + 51 03 54 1 43 12 43 -33
- 81 00 00 + 50 51 18 1 43 22 42 -32
- 83 00 00 + 50 37 31 1 43 32 41 -31
- 85 00 00 + 50 22 31 1 43 42 39 -29
- 87 00 00 + 50 06 18 1 43 52 38 -28
- 89 00 00 + 49 48 51 1 44 01 37 -27
- 91 00 00 + 49 30 10 1 44 11 36 -26
- 93 00 00 + 49 10 13 1 44 20 35 -25
- 95 00 00 + 48 49 00 1 44 29 33 -23
- 97 00 00 + 48 26 30 1 44 38 32 -22
- 99 00 00 + 48 02 42 1 44 47 31 -21
-101 00 00 + 47 37 37 1 44 55 30 -19
-103 00 00 + 47 11 13 1 45 03 28 -18
-105 00 00 + 46 43 30 1 45 11 27 -17
-107 00 00 + 46 14 27 1 45 19 26 -15
-109 00 00 + 45 44 04 1 45 27 24 -14
-111 00 00 + 45 12 21 1 45 34 23 -12
-113 00 00 + 44 39 17 1 45 40 21 -11
-115 00 00 + 44 04 53 1 45 47 20 -9
-117 00 00 + 43 29 09 1 45 53 18 -8
----------------------------------------------------------------------------
Jan Manek
Stefanik Observatory Private :
Petrin 205 Werichova 950
118 46 Praha 1 152 00 Praha 5 - Barrandov |_|_|
Czech Republic Czech Republic / \
Internet : jmanek@mbox.vol.cz |-O-O-|
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Jan Manek's update
IOTA/IOTA-ES occultation update for
(77) Frigga / TYC 1398 02324 event on 1999, February 5/6
visible from Middle East, Sicilia, Sardegna, Spain/France border,
Canada and north USA
Summary
On the night February 5/6, 1999 will be occulted 10.4 mag star by a 71km asteroid (77) Frigga.
This update is based on USNO/Flagstaff and TMO astrometry for asteroid and ACT star position.
That target star should be easy to locate as it is near brigh 4.7 mag gamma Cnc (Asselus
Borealis) which is NE of famouse M44 cluster. The calculation shows NO SHIFT in position and time and gives path essentially identical with the Goffin's nominal prediction for finder chart. Detailed finder charts for this event are available also here.
The event at one glimpse:
* date and approx. UT time of event: February, 6, 1999 @ 01:34 UT (Euro)
01:45 UT (USA)
* magnitude of target star: 10.4
* magnitude drop [mag]: 1.7
* estimated maximum duration [s]: 6.8
* path description: Path runs over Saudi Arabia, middle East and Sinai
peninsula ~1:30 UT, NE tip of Egypt with Alexandria just south.
Crete is just north ~1:31.5 UT amd Greece also ~1:32 UT. After that
path runs over Sicily (Messina) and very south of Italy ~1:32.5 UT,
crosses Sardegna ~1:33.5 UT and finaly runs along France/Spain
border ~1:34.5 UT with Barcelona being just south, Pic du Midi
and all Pyreney mountains being in.
After crossing the Atlantic ocean shadow enters Canada at Newfoundland
~1:41 UT and runs westward over Quebec and Ontario to go just north
of Lake Superior ~1:44 UT. Minnesota is in path shortly after,
North Dakota too ~1:45 UT. Also NE South Dakota, Montana, Wyoming
are within the path errors. The last is probably Idaho where the
twilight will complicate the observations ~1:45.5 UT.
The occultation path:
* approximate width [km]: 85
* uncertainty [path widths]: 2 (4)
* uncertainty in time [s]: 15 (25)
* map: attached two - Europe and North America
* remarks: Path uncertainities are given according to nominal star position
errors and expected asteroid positional accuracy. For any larger shift is
responsible true star position.
Circles along the path are OCCULT exactly calculated centerline points.
!!!!!!!
The uncertainity values given in brackets are based on the fact that
OCCULT 4.07 may have error up to 0.1" in the ground path. The source of
this difference was already tracked down, but at this very moment I don't
have the fixed version available.
!!!!!!!
Data for the target star:
* name: TYC 1398 02324 1
* constellation: Cancer
* J2000 position [h,m,s; o,',"]: 08h 40m 20.549s; +21o 32' 38.35"
* position source: ACT
* estimated accuracy ["]: 0.03" (0.03", 0.02")
* V mag [mag]: 10.42
* B-V [mag]: +0.26
* remarks: Target star is about 41' west of 4.7 mag star gamma Cnc which is NE
of open cluster M44. The magnitude given is Johnson V mag.
TYCHO quality flag is 4 indicating HIGH quality position.
Data for the minor planet:
* general information:
mumber, name: (77) Frigga
approx. diameter [km]: 71
* orbital information
orbit source: Calculation Manek
source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen)
number of used observations: 20 USNO, 27 TMO
number of rejected observations: 4 TMO (1999 01 29.317685,
1999 01 07.371979,
1997 09 23.251331,
1997 09 22.288854)
time covered by the observations: 1997 09 22 - 1999 02 03
rms residuals ["] (RA,DE): 0.08", 0.07"
estimated positional accuracy at epoch of event ["]: 0.10"
remarks:
Data for the event:
* UT date and time of least geocentric approach: 01:37:24 UT
* approx. V mag of minor planet at event [mag]: 11.8
* geocentric parallax of minor planet ["]: 5.767
* magnitude drop [mag]: 1.7
* estimated maximum duration [s]: 6.8
* apparent motion of minor planet ["/h]: 33.95
* angular distance to moon, phase of moon [deg,%]: 72, 74%
* remarks:
Calculator(s): Manek
Path coordinates:
Altitude
E. Longitude Latitude U.T. star sun
+ 47 00 00 + 24 28 06 1 29 06 22 -28
+ 45 00 00 + 25 21 46 1 29 16 24 -30
+ 43 00 00 + 26 15 22 1 29 26 26 -32
+ 41 00 00 + 27 08 48 1 29 36 28 -34
+ 39 00 00 + 28 02 00 1 29 47 29 -35
+ 37 00 00 + 28 54 53 1 29 59 31 -37
+ 35 00 00 + 29 47 20 1 30 11 33 -39
+ 33 00 00 + 30 39 18 1 30 24 35 -40
+ 31 00 00 + 31 30 41 1 30 37 37 -42
+ 29 00 00 + 32 21 26 1 30 51 38 -43
+ 27 00 00 + 33 11 28 1 31 04 40 -45
+ 25 00 00 + 34 00 43 1 31 19 42 -46
+ 23 00 00 + 34 49 08 1 31 33 43 -48
+ 21 00 00 + 35 36 39 1 31 48 45 -49
+ 19 00 00 + 36 23 13 1 32 03 46 -50
+ 17 00 00 + 37 08 46 1 32 18 48 -51
+ 15 00 00 + 37 53 18 1 32 33 49 -52
+ 13 00 00 + 38 36 45 1 32 49 50 -53
+ 11 00 00 + 39 19 04 1 33 04 52 -54
+ 9 00 00 + 40 00 15 1 33 20 53 -55
+ 7 00 00 + 40 40 16 1 33 35 54 -56
+ 5 00 00 + 41 19 04 1 33 51 55 -57
+ 3 00 00 + 41 56 40 1 34 07 56 -57
+ 1 00 00 + 42 33 02 1 34 22 57 -58
- 1 00 00 + 43 08 10 1 34 38 58 -58
- 3 00 00 + 43 42 02 1 34 53 59 -59
- 5 00 00 + 44 14 38 1 35 09 60 -59
- 7 00 00 + 44 45 59 1 35 24 60 -59
- 9 00 00 + 45 16 03 1 35 39 61 -59
- 11 00 00 + 45 44 52 1 35 55 61 -59
- 13 00 00 + 46 12 24 1 36 10 62 -59
- 15 00 00 + 46 38 40 1 36 25 62 -59
- 17 00 00 + 47 03 41 1 36 39 62 -59
- 19 00 00 + 47 27 27 1 36 54 63 -58
- 21 00 00 + 47 49 57 1 37 08 63 -58
........... ocean part cutted out ...........
- 47 00 00 + 50 52 24 1 40 04 58 -49
- 49 00 00 + 50 58 12 1 40 17 57 -49
- 51 00 00 + 51 02 52 1 40 29 57 -48
- 53 00 00 + 51 06 23 1 40 41 56 -47
- 55 00 00 + 51 08 45 1 40 53 55 -46
- 57 00 00 + 51 09 59 1 41 05 54 -45
- 59 00 00 + 51 10 05 1 41 17 53 -44
- 61 00 00 + 51 09 01 1 41 29 52 -43
- 63 00 00 + 51 06 49 1 41 40 51 -42
- 65 00 00 + 51 03 28 1 41 52 50 -41
- 67 00 00 + 50 58 58 1 42 03 49 -40
- 69 00 00 + 50 53 19 1 42 14 48 -39
- 71 00 00 + 50 46 30 1 42 26 47 -38
- 73 00 00 + 50 38 31 1 42 36 46 -37
- 75 00 00 + 50 29 21 1 42 47 45 -35
- 77 00 00 + 50 19 01 1 42 58 44 -34
- 79 00 00 + 50 07 29 1 43 08 43 -33
- 81 00 00 + 49 54 45 1 43 19 42 -32
- 83 00 00 + 49 40 48 1 43 29 41 -31
- 85 00 00 + 49 25 38 1 43 39 40 -30
- 87 00 00 + 49 09 15 1 43 49 39 -28
- 89 00 00 + 48 51 36 1 43 59 37 -27
- 91 00 00 + 48 32 43 1 44 08 36 -26
- 93 00 00 + 48 12 34 1 44 18 35 -25
- 95 00 00 + 47 51 08 1 44 27 34 -23
- 97 00 00 + 47 28 25 1 44 36 32 -22
- 99 00 00 + 47 04 24 1 44 45 31 -21
-101 00 00 + 46 39 04 1 44 53 30 -19
-103 00 00 + 46 12 26 1 45 02 28 -18
-105 00 00 + 45 44 28 1 45 10 27 -17
-107 00 00 + 45 15 11 1 45 17 25 -15
-109 00 00 + 44 44 33 1 45 25 24 -14
-111 00 00 + 44 12 35 1 45 32 23 -12
-113 00 00 + 43 39 16 1 45 39 21 -11
-115 00 00 + 43 04 37 1 45 45 19 -9
-117 00 00 + 42 28 38 1 45 51 18 -8
----------------------------------------------------------------------------
Jan Manek
Stefanik Observatory Private :
Petrin 205 Werichova 950
118 46 Praha 1 152 00 Praha 5 - Barrandov |_|_|
Czech Republic Czech Republic / \
Internet : jmanek@mbox.vol.cz |-O-O-|
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