Update for (335) Roberta - December 3, 1998
Final update computed by Jan Manek; issued 03 Dec 1998 08:51:54 +0100 (CET)
Preliminary update computed by Jan Manek; issued 26 Nov 1998 15:22:50 +0100 (CET)
Jan Manek's FINAL update
IOTA/IOTA-ES occultation update for
(335) Roberta / HIP 34947 event on 1998, December 3
visible from Japan, China on far East,
Turkey, Greece, southern Italy, Algeria and Morocco
Summary
On December 3, 1998 will be occulted 7.3 mag star by a 94km asteroid
(335) Roberta. This final update is based on USNO/Flagstaff and TMO
astrometry for asteroid and HIPPARCOS star position.
The updated path is significantly north of Goffin's nominal path with small
time correction. Compared to the preliminary update (Nov 26) this final
path is shifted by about 15km to north and has a few second time correction
but within errors the paths are identical.
The event at one glimpse:
* date and approx. UT time of event: December, 3, 1998 @ 21:29 UT (Japan),
21:45 UT (Euro)
* magnitude of target star: 7.3
* magnitude drop [mag]: 6.3
* estimated maximum duration [s]: 10.3
* path description: In morning twilight the path crosses southern Shikoku and
Kyushu in Japan ~21:29UT, hits extreme south of South Corea, and enters
China ~21:30 UT. At ~21:37 UT hits Kirgizia, ~21:38 UT southern Khazach,
barely misses Taschkent - Uzbek capital and runs uver rest of Uzbekistan.
Also hits Georgia ~21:41 UT and runs along Black sea coast of Turkey.
Hits north Greece ~21:44UT and south Italy and north Sicily ~21:45UT.
After that path runs along Mediterrian coast of Africa and leaves Earth.
The occultation path:
* approximate width [km]: 100
* uncertainty [path widths]: 1.2
* uncertainty in time [s]: 20
* map: attached for Japan and Europe
* remarks:
!!!!!!!
Circles along the path are OCCULT exactly calculated centerline points.
!!!!!!!
Data for the target star:
* name: HIP 34947 = PPM 123727 = SAO 96652 = TYC 1346 00746 1
* constellation:
* J2000 position [h,m,s; o,',"]: 07h 13m 53.000s; +16o 34' 49.07"
* position source: HIPPARCOS
* estimated accuracy ["]: 0.01"
* V mag [mag]: 7.25
* remarks:
Data for the minor planet:
* general information:
mumber, name: (335) Roberta
approx. diameter [km]: 94
* orbital information
orbit source: Bowell
source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen)
number of used observations: 21 USNO, 1 TMO
number of rejected observations: 1 (1997 Nov 9)
time covered by the observations: 1998 09 23 - 1998 11 27
rms residuals ["] (RA,DE): 0.09", 0.06"
estimated positional accuracy at epoch of event ["]: 0.11"
remarks:
Data for the event:
* UT date and time of least geocentric approach: 21:37:06 UT
* approx. V mag of minor planet at event [mag]: 13.5
* geocentric parallax of minor planet ["]: 4.302
* magnitude drop [mag]: 6.3
* estimated maximum duration [s]: 10.3
* apparent motion of minor planet ["/h]: 22.12
* angular distance to moon, phase of moon [deg,%]: 34, 100%
* remarks:
Calculator(s): Manek
Path coordinates:
Altitude
E. Longitude Latitude U.T. star sun
+137 00 00 + 30 58 30 21 28 19 31 -2
+135 00 00 + 31 31 35 21 28 31 33 -4
+133 00 00 + 32 04 05 21 28 44 35 -5
+131 00 00 + 32 35 58 21 28 58 36 -7
+129 00 00 + 33 07 13 21 29 12 38 -9
+127 00 00 + 33 37 47 21 29 26 39 -11
+125 00 00 + 34 07 40 21 29 41 41 -12
+123 00 00 + 34 36 51 21 29 56 42 -14
+121 00 00 + 35 05 16 21 30 11 44 -16
+119 00 00 + 35 32 56 21 30 27 45 -17
+117 00 00 + 35 59 49 21 30 43 47 -19
+115 00 00 + 36 25 55 21 30 59 48 -20
+113 00 00 + 36 51 11 21 31 15 49 -22
+111 00 00 + 37 15 38 21 31 32 51 -24
+109 00 00 + 37 39 14 21 31 49 52 -25
+107 00 00 + 38 02 00 21 32 06 53 -27
+105 00 00 + 38 23 53 21 32 23 54 -28
+103 00 00 + 38 44 54 21 32 40 56 -30
+101 00 00 + 39 05 02 21 32 57 57 -31
+ 99 00 00 + 39 24 17 21 33 15 58 -33
+ 97 00 00 + 39 42 38 21 33 32 59 -34
+ 95 00 00 + 40 00 05 21 33 50 60 -36
+ 93 00 00 + 40 16 37 21 34 07 60 -37
+ 91 00 00 + 40 32 15 21 34 25 61 -39
+ 89 00 00 + 40 46 59 21 34 43 62 -40
+ 87 00 00 + 41 00 47 21 35 00 62 -42
+ 85 00 00 + 41 13 40 21 35 18 63 -43
+ 83 00 00 + 41 25 38 21 35 36 63 -45
+ 81 00 00 + 41 36 40 21 35 53 64 -46
+ 79 00 00 + 41 46 47 21 36 11 64 -47
+ 77 00 00 + 41 55 59 21 36 29 64 -49
+ 75 00 00 + 42 04 14 21 36 46 64 -50
+ 73 00 00 + 42 11 35 21 37 04 64 -51
+ 71 00 00 + 42 17 59 21 37 21 64 -53
+ 69 00 00 + 42 23 28 21 37 39 64 -54
+ 67 00 00 + 42 28 01 21 37 56 64 -55
+ 65 00 00 + 42 31 38 21 38 14 63 -56
+ 63 00 00 + 42 34 19 21 38 31 63 -58
+ 61 00 00 + 42 36 04 21 38 48 63 -59
+ 59 00 00 + 42 36 54 21 39 05 62 -60
+ 57 00 00 + 42 36 47 21 39 22 61 -61
+ 55 00 00 + 42 35 45 21 39 39 61 -62
+ 53 00 00 + 42 33 46 21 39 56 60 -63
+ 51 00 00 + 42 30 52 21 40 12 59 -64
+ 49 00 00 + 42 27 01 21 40 29 58 -65
+ 47 00 00 + 42 22 14 21 40 45 57 -66
+ 45 00 00 + 42 16 31 21 41 01 56 -67
+ 43 00 00 + 42 09 52 21 41 17 55 -68
+ 41 00 00 + 42 02 17 21 41 33 54 -69
+ 39 00 00 + 41 53 45 21 41 49 53 -69
+ 37 00 00 + 41 44 17 21 42 05 52 -70
+ 35 00 00 + 41 33 53 21 42 20 51 -70
+ 33 00 00 + 41 22 32 21 42 35 50 -71
+ 31 00 00 + 41 10 15 21 42 50 48 -71
+ 29 00 00 + 40 57 02 21 43 05 47 -71
+ 27 00 00 + 40 42 53 21 43 20 46 -71
+ 25 00 00 + 40 27 47 21 43 34 44 -71
+ 23 00 00 + 40 11 46 21 43 48 43 -71
+ 21 00 00 + 39 54 48 21 44 02 42 -70
+ 19 00 00 + 39 36 55 21 44 16 40 -70
+ 17 00 00 + 39 18 07 21 44 29 39 -69
+ 15 00 00 + 38 58 23 21 44 42 38 -68
+ 13 00 00 + 38 37 45 21 44 55 36 -67
+ 11 00 00 + 38 16 12 21 45 07 35 -66
+ 9 00 00 + 37 53 45 21 45 19 33 -65
+ 7 00 00 + 37 30 25 21 45 31 32 -64
+ 5 00 00 + 37 06 12 21 45 42 30 -63
+ 3 00 00 + 36 41 07 21 45 52 28 -62
+ 1 00 00 + 36 15 10 21 46 03 27 -60
- 1 00 00 + 35 48 23 21 46 13 25 -59
- 3 00 00 + 35 20 47 21 46 22 24 -58
- 5 00 00 + 34 52 22 21 46 31 22 -56
- 7 00 00 + 34 23 09 21 46 39 20 -55
- 9 00 00 + 33 53 11 21 46 47 19 -53
- 11 00 00 + 33 22 28 21 46 54 17 -52
- 13 00 00 + 32 51 02 21 47 01 15 -50
- 15 00 00 + 32 18 55 21 47 06 14 -48
- 17 00 00 + 31 46 08 21 47 12 12 -47
- 19 00 00 + 31 12 44 21 47 16 10 -45
- 21 00 00 + 30 38 44 21 47 20 8 -43
- 23 00 00 + 30 04 10 21 47 23 6 -42
- 25 00 00 + 29 29 06 21 47 26 5 -40
----------------------------------------------------------------------------
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
(335) Roberta / HIP 34947 event on 1998, December 3
visible from Japan, China on far East,
Turkey, Greece, southern Italy, Algeria and Morocco
Summary
On December 3, 1998 will be occulted 7.3 mag star by a 94km asteroid (335)
Roberta. This preliminary update is based on USNO/Flagstaff and TMO
astrometry for asteroid and HIPPARCIS star position. The updated path is
significantly north of Goffin's nominal path with small time correction.
The event at one glimpse:
* date and approx. UT time of event: December, 3, 1998 @ 21:29 UT (Japan),
21:45 UT (Euro)
* magnitude of target star: 7.3
* magnitude drop [mag]: 6.3
* estimated maximum duration [s]: 10.3
* path description: not given in this preliminary note. Check the chart.
The occultation path:
* approximate width [km]: 100
* uncertainty [path widths]: 2
* uncertainty in time [s]: 20
* map: attached for Japan and Europe
* remarks:
!!!!!!!
Circles along the path are OCCULT exactly calculated centerline points.
!!!!!!!
Data for the target star:
* name: HIP 34947 = PPM 123727 = SAO 96652 = TYC 1346 00746 1
* constellation:
* J2000 position [h,m,s; o,',"]: 07h 13m 53.000s; +16o 34' 49.07"
* position source: HIPPARCOS
* estimated accuracy ["]: 0.01"
* V mag [mag]: 7.25
* remarks:
Data for the minor planet:
* general information:
mumber, name: (335) Roberta
approx. diameter [km]: 94
* orbital information
orbit source: Bowell
source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen)
number of used observations: 19 USNO, 1 TMO
number of rejected observations: 1 (1997 Nov 9)
time covered by the observations: 1998 09 23 - 1998 11 25
rms residuals ["] (RA,DE): 0.08", 0.06"
estimated positional accuracy at epoch of event ["]: 0.10"
remarks:
Data for the event:
* UT date and time of least geocentric approach: 21:37:06 UT
* approx. V mag of minor planet at event [mag]: 13.5
* geocentric parallax of minor planet ["]: 4.302
* magnitude drop [mag]: 6.3
* estimated maximum duration [s]: 10.3
* apparent motion of minor planet ["/h]: 22.12
* angular distance to moon, phase of moon [deg,%]: 34, 100%
* remarks:
Calculator(s): Manek
Path coordinates:
Altitude
E. Longitude Latitude U.T. star sun
+135 00 00 + 31 23 23 21 28 30 33 -4
+133 00 00 + 31 55 53 21 28 43 35 -5
+131 00 00 + 32 27 47 21 28 56 36 -7
+129 00 00 + 32 59 02 21 29 10 38 -9
+127 00 00 + 33 29 38 21 29 25 39 -10
+125 00 00 + 33 59 31 21 29 39 41 -12
+123 00 00 + 34 28 42 21 29 55 42 -14
+121 00 00 + 34 57 08 21 30 10 44 -16
+119 00 00 + 35 24 49 21 30 26 45 -17
+117 00 00 + 35 51 43 21 30 42 47 -19
+115 00 00 + 36 17 49 21 30 58 48 -20
+113 00 00 + 36 43 06 21 31 14 49 -22
+111 00 00 + 37 07 34 21 31 31 51 -24
+109 00 00 + 37 31 11 21 31 48 52 -25
+107 00 00 + 37 53 57 21 32 04 53 -27
+105 00 00 + 38 15 51 21 32 22 54 -28
+103 00 00 + 38 36 52 21 32 39 56 -30
+101 00 00 + 38 57 01 21 32 56 57 -31
+ 99 00 00 + 39 16 17 21 33 14 58 -33
+ 97 00 00 + 39 34 38 21 33 31 59 -34
+ 95 00 00 + 39 52 06 21 33 49 60 -36
+ 93 00 00 + 40 08 39 21 34 06 60 -37
+ 91 00 00 + 40 24 18 21 34 24 61 -39
+ 89 00 00 + 40 39 02 21 34 42 62 -40
+ 87 00 00 + 40 52 51 21 34 59 63 -42
+ 85 00 00 + 41 05 44 21 35 17 63 -43
+ 83 00 00 + 41 17 43 21 35 35 64 -45
+ 81 00 00 + 41 28 46 21 35 53 64 -46
+ 79 00 00 + 41 38 53 21 36 10 64 -47
+ 77 00 00 + 41 48 05 21 36 28 64 -49
+ 75 00 00 + 41 56 21 21 36 46 65 -50
+ 73 00 00 + 42 03 41 21 37 03 65 -51
+ 71 00 00 + 42 10 06 21 37 21 64 -53
+ 69 00 00 + 42 15 35 21 37 38 64 -54
+ 67 00 00 + 42 20 08 21 37 56 64 -55
+ 65 00 00 + 42 23 45 21 38 13 64 -56
+ 63 00 00 + 42 26 27 21 38 30 63 -58
+ 61 00 00 + 42 28 12 21 38 47 63 -59
+ 59 00 00 + 42 29 02 21 39 05 62 -60
+ 57 00 00 + 42 28 55 21 39 22 61 -61
+ 55 00 00 + 42 27 52 21 39 38 61 -62
+ 53 00 00 + 42 25 54 21 39 55 60 -63
+ 51 00 00 + 42 22 59 21 40 12 59 -64
+ 49 00 00 + 42 19 08 21 40 28 58 -65
+ 47 00 00 + 42 14 21 21 40 45 57 -66
+ 45 00 00 + 42 08 38 21 41 01 56 -67
+ 43 00 00 + 42 01 58 21 41 17 55 -68
+ 41 00 00 + 41 54 22 21 41 33 54 -69
+ 39 00 00 + 41 45 50 21 41 49 53 -70
+ 37 00 00 + 41 36 22 21 42 05 52 -70
+ 35 00 00 + 41 25 57 21 42 20 51 -71
+ 33 00 00 + 41 14 35 21 42 35 50 -71
+ 31 00 00 + 41 02 18 21 42 50 48 -71
+ 29 00 00 + 40 49 04 21 43 05 47 -71
+ 27 00 00 + 40 34 54 21 43 20 46 -71
+ 25 00 00 + 40 19 48 21 43 34 44 -71
+ 23 00 00 + 40 03 45 21 43 48 43 -71
+ 21 00 00 + 39 46 47 21 44 02 42 -70
+ 19 00 00 + 39 28 53 21 44 16 40 -70
+ 17 00 00 + 39 10 04 21 44 29 39 -69
+ 15 00 00 + 38 50 20 21 44 42 38 -68
+ 13 00 00 + 38 29 40 21 44 55 36 -67
+ 11 00 00 + 38 08 07 21 45 07 35 -66
+ 9 00 00 + 37 45 39 21 45 19 33 -65
+ 7 00 00 + 37 22 18 21 45 31 32 -64
+ 5 00 00 + 36 58 04 21 45 42 30 -63
+ 3 00 00 + 36 32 58 21 45 53 28 -62
+ 1 00 00 + 36 07 00 21 46 03 27 -60
- 1 00 00 + 35 40 13 21 46 13 25 -59
- 3 00 00 + 35 12 35 21 46 22 24 -58
- 5 00 00 + 34 44 09 21 46 31 22 -56
- 7 00 00 + 34 14 56 21 46 39 20 -55
- 9 00 00 + 33 44 57 21 46 47 19 -53
- 11 00 00 + 33 14 13 21 46 54 17 -52
- 13 00 00 + 32 42 47 21 47 01 15 -50
- 15 00 00 + 32 10 39 21 47 07 14 -48
- 17 00 00 + 31 37 52 21 47 12 12 -47
- 19 00 00 + 31 04 26 21 47 16 10 -45
- 21 00 00 + 30 30 26 21 47 20 8 -43
- 23 00 00 + 29 55 52 21 47 23 6 -42
- 25 00 00 + 29 20 47 21 47 26 5 -40
----------------------------------------------------------------------------
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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