Update for (52) Europa - October 3, 1998
Update computed by Jan Manek; issued 01 Oct 1998 09:49:18 +0200 (CEST)
Jan Manek's update
IOTA/IOTA-ES occultation update for
(52) Europa/GSC 1297 01080 event on 1998 October 3
visible from Portugal, Spain, south France, Italy,
former Yugoslavia, Romania
Summary
Shortly before midnight of 1998 October 3 the large 312 km asteroid (52)
Europa will occult an 12 mag star near the Orion/Taurus border. The data
gives quite good path location crossing areas with many observers showing
over 30 seconds long occultation but the magnitude drop is about 0.5 mag
only. EAON list gives incorrect observing window for occultation !!
Correct observing window is 23:27 - 23:35 UT for whole Europe. For more
detailed circumstances consult the chart.
The event at one glimpse:
* date and approx. UT time of event: 1998 October 3 @ 23h 30m UT
* magnitude of target star: 12.0
* magnitude drop [mag]: 0.5
* estimated maximum duration [s]: 36.5
* rough path description: Portugal, Spain, south France, Italy, former
Yugoslavia, Romania, northen Bulgaria, Krym peninsula and more to east
The occultation path:
* approximate widths [km]: 320
* uncertainty [path widths]: 0.2
* map: attached
* remarks: about 1.5 path width (300 km) south shift mainly due to new star
position compared to Goffin's nominal prediction
Data for the target star:
* name: GSC 1297 01080
* constellation: northern Orion, near border with Taurus
* J2000 position [h,m,s; o,',"]: RA 5h 33m 35.506s DE +15o 13' 43.51"
* position source: USNO astrometry
* estimated accuracy ["]: 0.02
* V mag [mag]: 11.99 (USNO)
* remarks:
Data for the minor planet:
* general information:
mumber, name: (52) Europa
approx. diameter [km]: 312
* orbital information
orbit source: Bowell
source of used astrometry: 4 USNO positions, 2 TMO
number of used observations: 6
number of rejected observations: 0
time covered by the observations: 1998 Sep 23 - 1998 Sep 30
rms residuals ["] (RA,DE): 0.06, 0.06
estimated positional accuracy at epoch of event ["]: 0.10"
remarks:
Data for the event:
* UT date and time of least geocentric approach: 1998h 10m 3d @ 23h 41m 06s UT
* uncertainty in time [s]: 20
* approx. V mag of minor planet at event [mag]: 11.5
* geocentric parallax of minor planet ["]: 3.64
* magnitude drop [mag]: 0.5
* estimated maximum duration [s]: 36.5
* apparent motion of minor planet ["/h]: 17.57
* angular distance to moon, phase of moon [deg,%]: 99, 95%
* remarks:
Calculator(s): Manek
Path coordinates:
E. Longitude Latitude U.T. star sun
- 17 00 00 + 38 09 34 23 29 50 5 -51
- 15 00 00 + 38 39 48 23 29 52 7 -51
- 13 00 00 + 39 09 04 23 29 56 8 -52
- 11 00 00 + 39 37 20 23 29 59 10 -52
- 9 00 00 + 40 04 35 23 30 04 12 -52
- 7 00 00 + 40 30 48 23 30 09 13 -52
- 5 00 00 + 40 55 58 23 30 15 15 -52
- 3 00 00 + 41 20 03 23 30 21 16 -52
- 1 00 00 + 41 43 05 23 30 27 18 -52
+ 1 00 00 + 42 05 01 23 30 35 19 -52
+ 3 00 00 + 42 25 51 23 30 42 21 -52
+ 5 00 00 + 42 45 34 23 30 51 22 -52
+ 7 00 00 + 43 04 11 23 30 59 24 -51
+ 9 00 00 + 43 21 41 23 31 09 25 -51
+ 11 00 00 + 43 38 04 23 31 18 27 -50
+ 13 00 00 + 43 53 19 23 31 28 28 -50
+ 15 00 00 + 44 07 26 23 31 39 30 -49
+ 17 00 00 + 44 20 25 23 31 50 31 -48
+ 19 00 00 + 44 32 17 23 32 01 33 -48
+ 21 00 00 + 44 43 00 23 32 13 34 -47
+ 23 00 00 + 44 52 35 23 32 25 35 -46
+ 25 00 00 + 45 01 01 23 32 37 37 -45
+ 27 00 00 + 45 08 20 23 32 50 38 -44
+ 29 00 00 + 45 14 30 23 33 03 39 -44
+ 31 00 00 + 45 19 31 23 33 17 41 -43
+ 33 00 00 + 45 23 24 23 33 31 42 -42
+ 35 00 00 + 45 26 08 23 33 45 43 -41
+ 37 00 00 + 45 27 43 23 34 00 45 -40
+ 39 00 00 + 45 28 10 23 34 15 46 -39
+ 41 00 00 + 45 27 27 23 34 30 47 -37
+ 43 00 00 + 45 25 35 23 34 45 48 -36
+ 45 00 00 + 45 22 34 23 35 01 50 -35
+ 47 00 00 + 45 18 23 23 35 18 51 -34
+ 49 00 00 + 45 13 03 23 35 34 52 -33
+ 51 00 00 + 45 06 32 23 35 51 53 -32
+ 53 00 00 + 44 58 52 23 36 08 54 -31
+ 55 00 00 + 44 50 01 23 36 26 55 -29
+ 57 00 00 + 44 40 00 23 36 43 56 -28
+ 59 00 00 + 44 28 47 23 37 01 57 -27
+ 61 00 00 + 44 16 24 23 37 20 58 -25
+ 63 00 00 + 44 02 50 23 37 39 59 -24
+ 65 00 00 + 43 48 04 23 37 58 60 -23
+ 67 00 00 + 43 32 06 23 38 17 61 -21
+ 69 00 00 + 43 14 57 23 38 36 61 -20
+ 71 00 00 + 42 56 36 23 38 56 62 -19
+ 73 00 00 + 42 37 04 23 39 16 63 -17
+ 75 00 00 + 42 16 20 23 39 37 63 -16
+ 77 00 00 + 41 54 23 23 39 57 63 -14
+ 79 00 00 + 41 31 16 23 40 18 64 -13
----------------------------------------------------------------------------
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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