IOTA/IOTA-ES occultation update for
(164) Eva / TYC 5045-00218-1 on April 21/22, 2004
visible from N Hungary, Slovakia, Austria, S Czechia, S Germany,
N Switzerland, mid-north France and NE Canada
Summary
In the night of April 21/22, 2004 a faint 11.1 mag star TYC 5045-00218-1 will be occulted by a 110 km asteroid (164) Eva. This update is based on USNO/Flagstaff and TMO astrometry for the asteroid and UCAC2 star position.
The updated path shows ~1 path width shift with time ~0.2 minutes later compared to Edwin Goffin's nominal prediction.
Updated path runs over N Hungary ~2:59.6 UT, Slovakia ~2:59.8 UT, Austria ~3:00.2 UT, S Czechia ~3:00.3 UT, S Germany ~3:00.6 UT, N Switzerland ~3:00.8 UT, mid-north France ~3:01.4 UT and NE Canada around 3:08 UT. Please check the path chart for details.
Jean Lecacheux pointed out that on June 17th, 2000 was observed occultation of HIP 84192 by Eva and results were interesting. One possible explanation was that Eva possibly has a satellite, one possible solution is depicted here. Observer #5 (miss) has probably followed wrong star according his own words. Having this in mind observers in area about two times wider than current uncertainty should follow this occultation and monitor for secondary event lasting up to ~2 seconds.
Here is current station list for European cities and observatories plus other sites.
If you would like to have your station listed with other observetories and sites, send me your request using the structure descripted here
Clear sky and good luck !!!
The event at one glimpse:
* date and approx. UT time of event: April 22, 2004 @ 03:01 UT (Europe)
* magnitude of target star: 11.1
* magnitude drop [mag]: 2.5
* estimated maximum duration [s]: 10.1
* approx. V mag of minor planet at event [mag]: 13.5
* geocentric parallax of minor planet ["]: 4.200
* apparent motion of minor planet ["/h]: 25.83
* angular distance to moon, phase of moon [deg,%]: 163, 6%
* Goffin's original chart reference: A04_0414
The occultation path with path maps:
* approximate ground width [km]: 185
* uncertainty [path widths]: 0.9
* uncertainty in time [s]: 10
* map: Overview
European part
Canadian part
* remarks: Path uncertainties [2 sigmas] are given according to nominal star
position errors and expected asteroid positional accuracy.
Elements for WinOccult - use 'Save as ...' to download and save these elements.
Finding charts (prepared in GUIDE8):
* occulted star is in center - labeled with cross
* labeled stars have indicated SAO numbers
* (smaller) square box shows 30' field in all wider field charts
* (larger) square box shows 3° field in wide field charts
* remarks:
Target star is in west Ophiuchus, about 1.4 degrees SW of 3.2 mag star epsilon Ophiuchi = SAO 141086.
!!! 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.
40-degree chart
3-degree chart
0.5-degree chart
Data for the target star:
* name: TYC 5045-00218-1
* constellation: Ophiuchus
* J2000 position [h,m,s; o,',"]: 16h 14m 41.5604s; -05o 43' 05.474"
* position source: UCAC2
* estimated accuracy ["]: 0.03" (0.02", 0.02")
* V mag [mag]: 11.12
* B-V [mag]: +0.82
* remarks:
Data for the minor planet:
* general information:
number, name: (164) Eva
approx. diameter [km]: 110
* orbital information
orbit source: calculation Manek
source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen)
number of used observations: 129 USNO, 2 TMO
number of rejected observations: 0
time covered by the observations: 1998 02 12 - 2004 03 25
rms residuals ["] (RA,DE): 0.11", 0.11"
estimated positional accuracy at epoch of event ["]: 0.06", 0.06"
remarks:
Path coordinates: click here
Calculator(s): Jan Manek
----------------------------------------------------------------------------
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 AT worldonline.cz |-O-O-|
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IOTA/IOTA-ES occultation update for
(164) Eva / TYC 5045-00218-1 on April 21/22, 2004
visible from SE Poland, Slovakia, N Austria, Czechia, S Germany,
N Switzerland, mid-north France and NE Canada
Summary
In the night of April 21/22, 2004 a faint 11.1 mag star TYC 5045-00218-1 will be occulted by a 110 km asteroid (164) Eva. This update is based on USNO/Flagstaff, TMO, OAC and Ondrejov astrometry for the asteroid and UCAC2 star position.
The updated path shows no shift with time ~0.3 minutes later compared to Edwin Goffin's nominal prediction.
Updated path runs over SE Poland ~2:59.7 UT, Slovakia ~2:59.8 UT, NE Austria ~3:00.2 UT, Czechia ~3:00.3 UT, S Germany ~3:00.7 UT, north France ~3:01.5 UT and NE Canada around 3:08 UT. Please check the path chart for details.
Jean Lecacheux pointed out that on June 17th, 2000 was observed occultation of HIP 84192 by Eva and results were interesting. One possible explanation was that Eva possibly has a satellite, one possible solution is depicted here. Observer #5 (miss) has probably followed wrong star according his own words. Having this in mind observers in area about two times wider than current uncertainty should follow this occultation and monitor for secondary event lasting up to ~2 seconds.
Here is current station list for European cities and observatories plus other sites.
If you would like to have your station listed with other observetories and sites, send me your request using the structure descripted here
Clear sky and good luck !!!
The event at one glimpse:
* date and approx. UT time of event: April 22, 2004 @ 03:01 UT (Europe)
* magnitude of target star: 11.1
* magnitude drop [mag]: 2.5
* estimated maximum duration [s]: 10.1
* approx. V mag of minor planet at event [mag]: 13.5
* geocentric parallax of minor planet ["]: 4.200
* apparent motion of minor planet ["/h]: 25.83
* angular distance to moon, phase of moon [deg,%]: 163, 6%
* Goffin's original chart reference: A04_0414
The occultation path with path maps:
* approximate ground width [km]: 185
* uncertainty [path widths]: 0.75
* uncertainty in time [s]: 9
* map: Overview
European part
Canadian part
* remarks: Path uncertainties [2 sigmas] are given according to nominal star
position errors and expected asteroid positional accuracy.
Elements for WinOccult - use 'Save as ...' to download and save these elements.
Finding charts (prepared in GUIDE8):
* occulted star is in center - labeled with cross
* labeled stars have indicated SAO numbers
* (smaller) square box shows 30' field in all wider field charts
* (larger) square box shows 3° field in wide field charts
* remarks:
Target star is in west Ophiuchus, about 1.4 degrees SW of 3.2 mag star epsilon Ophiuchi = SAO 141086.
!!! 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.
40-degree chart
3-degree chart
0.5-degree chart
Data for the target star:
* name: TYC 5045-00218-1
* constellation: Ophiuchus
* J2000 position [h,m,s; o,',"]: 16h 14m 41.5604s; -05o 43' 05.474"
* position source: UCAC2
* estimated accuracy ["]: 0.03" (0.02", 0.02")
* V mag [mag]: 11.12
* B-V [mag]: +0.82
* remarks:
Data for the minor planet:
* general information:
number, name: (164) Eva
approx. diameter [km]: 110
* orbital information
orbit source: calculation Manek
source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen),
OAC (A.Lopez, R.Pacheco, J.Forteza), Ondrejov (P.Kusnirak, J.Manek)
number of used observations: 129 USNO, 2 TMO, 5 OAC, 10 Ondrejov
number of rejected observations: 0
time covered by the observations: 1998 02 12 - 2004 04 18
rms residuals ["] (RA,DE): 0.11", 0.11"
estimated positional accuracy at epoch of event ["]: 0.05", 0.05"
remarks:
Path coordinates: click here
Calculator(s): Jan Manek
----------------------------------------------------------------------------
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 AT worldonline.cz |-O-O-|
--------------------------------------------------------------------U---U---