WebPage:
http://www.sternfreunde-breisgau.de/tercidina.html
Martin Federspiel schrieb:
> GERMAN SUMMARY
>
> Liebe Beobachter von Sternbedeckungen durch Kleinplaneten,
>
> mit aktueller Astrometrie für den Kleinplaneten habe ich ein "Update"
> für die sehr günstige Sternbedeckung von omega 1 Tauri durch den
> Kleinplaneten (345) Tercidina gerechnet. Der Bedeckungsstreifen
> verläuft - wie auch schon vor einigen Tagen von Jan Manek berechnet -
> u.a. über Frankreich, Süddeutschland (Freiburg, München), Österreich
> (Linz, Wien) weiter nach Osteuropa. Details wollen Sie bitte dem unten
> angehängten englischen Text entnehmen. Das komplette Update mit Karten
> finden Sie unter:
http://www.sternfreunde-breisgau.de/tercidina.html .
> Noch ein Wort zum Wetter (Stand Sonntag vormittag): Laut AVM ist zum
> Zeitpunkt der Bedeckung in Süddeutschland und Österreich mit Nebel und
> Wolken zu rechnen, bessere Chancen auf gutes Wetter bestehen in Frankreich.
> Jetzt kann man sich einen Beobachtungsplatz aussuchen...
>
> ENGLISH SUMMARY
>
> Dear observers of asteroidal occultations,
>
> using recent astrometry for the asteroid I calculated an update for
> the very favourable occultation of omega 1 Tauri by (345) Tercidina.
> The updated path is very similar to the path calculated a few days ago
> by Jan Manek. It runs over France, southern Germany, Austria, and
> parts of eastern Europe. The complete update including maps can be
> found at
http://www.sternfreunde-breisgau.de/tercidina.html . Weather
> prospects (as of Sunday morning): According to AVM fog and clouds are
> expected in southern Germany and Austria, whereas favourable weather
> is predicted for France. Now you can choose your observing site...
>
> Martin Federspiel
> -------------------------------------------------------------------------
> Dr. Martin Federspiel
> E-mail: martin@astro.unibas.ch
> oder: federspiel@planetarium-freiburg.de
>
> privat: dienstlich:
> Planetarium Freiburg
> Benzhauser Str. 21 Friedrichstr. 51
> D-79232 March-Holzhausen D-79098 Freiburg
> Tel./Fax: +49 (0)7665 932064 Tel.: +49 (0)761 2017946
> -------------------------------------------------------------------------
>
> IOTA/IOTA-ES occultation update for
> (345) Tercidina/omega_1 Tau (43 Tau) event on 2002 Sep 17
> visible from France, southern Germany, Austria, parts of Eastern Europe
>
> Summary
>
> Shortly after midnight (UT) of 2002 September 16/17 the about 90 km large
> asteroid (345) Tercidina will occult the 5.5 mag star omega_1 Tau (43 Tau)
> along a roughly 110 km wide path from the French Atlantic coast over
> southern Germany, Austria, Slowakia, northern Hungaria, northern Romania,
> Ukraine, to Southern Russia.
>
> In case of an occultation the combined light of the target star and the
> asteroid will drop by 7.3 mag to 12.8 mag for at most 11 seconds.
>
> OBSERVATIONS ARE STRONGLY ENCOURAGED FOR THIS VERY FAVOURABLE EVENT,
> especially with video equipment and near the limits of the event.
> Also observers up to two path widths outside the predicted path should
> observe the event and report if an occultation occured or not.
>
> This update is based on UNSO (kindly provided by Ron Stone) , TMO (Bill
> Owen) , Geneva (Raoul Behrend) , and Gnosca (Stefano Sposetti) astrometry
> for the asteroid and the Hipparcos position for the star.
>
> The event at one glimpse:
> * date and approx. UT time of event: 2002 September 17 between 0:44 UTC and
> 0:50 UTC
> * magnitude of target star: 5.5
> * magnitude drop [mag]: 7.3
> * estimated maximum duration [s]: 11
> * rough path description: France, southern Germany, Austria,
> parts of Eastern Europe
> * Goffin nominal prediction map: A02_0936
> * complete update including maps on the internet:
>
http://www.sternfreunde-breisgau.de/tercidina.html
>
> The occultation path:
> * approximate projected width [km]: 110
> * more detailed path description: French Atlantic coast near Nantes
> (0:44:23),
> Angers, Tours (0:44:40), Mulhouse, Freiburg i.Br. (0:45:22), Munich
> (0:45:46), Linz (0:46:5), Vienna (0:46:19), Bratislava, northern Hungaria,
> northern Romania, Ukraine, Southern Russia.
> * uncertainty [path widths]: 0.9
> * maps: available at
http://www.sternfreunde-breisgau.de/tercidina.html
> * remarks: The updated path is almost identical to the preliminarily
> updated path published by Jan Manek
>
> Data for the target star:
> * name: omega1 Tau = 43 Tau = FK6 1115 = HIP 19388 = SAO 93785
> PPM 119655 = TYC 1259-00984-1
> * constellation: Taurus
> * J2000 position [h,m,s; °,´,"]: 04h 09m 09.9884s; +19° 36´ 33.096"
> * position source: Hipparcos
> * estimated accuracy ["]: 0.01
> * V mag [mag]: 5.5
> * remarks: label omega1 Tau is not used in all star atlasses - do not
> confuse with omega Tau = 50 Tau 2 degrees farther to the north east;
> target star has spectral type G5 and should have a yellow-orange
> colour
>
> Data for the minor planet:
> * general information:
> number, name: (345) Tercidina
> approx. diameter [km]: 90
> * orbital information
> orbit source: calculation Federspiel
> source of used astrometry: USNO, TMO, Geneva, Gnosca
> number of used observations: 79
> number of rejected observations: 2 UNSO
> time covered by the observations: 1998 Jul 15 - 2002 Sep 13
> rms residuals ["] (RA,DE): 0.07, 0.07
> estimated positional accuracy at epoch of event ["]: 0.07
> remarks: serveral observation per night and observer were averaged
> to a mean observation for that night (TMO, Gnosca, Geneva)
>
> Data for the event:
> * UT date and time of least geocentric approach: 2002 Sep 17 @ 0h 52m 43s UT
> * least geocentric distance ["]: 2.09
> * uncertainty in time [s]: 9
> * approx. V mag of minor planet at event [mag]: 12.8
> * geocentric parallax of minor planet ["]: 5.28
> * magnitude drop [mag]: 7.3
> * estimated maximum duration [s]: 11
> * apparent motion of minor planet ["/h]: 26.67
> * angular distance to moon, phase of moon [°,%]: 121, 81%+
> * remarks:
>
> Path coordinates:
> Lat. Long. hh:mm:ss UT StarAlt° StarAzi° SunAlt° SunAzi°
> 47.72 3.78 0:44:56. ! 40.0 105.7 -37.9 20.8
> 47.84 5.72 0:45: 8. ! 41.3 107.6 -37.3 23.2
> 47.94 7.61 0:45:20. ! 42.5 109.5 -36.6 25.5
> 48.02 9.47 0:45:32. ! 43.6 111.4 -36.0 27.8
> 48.08 11.30 0:45:44. ! 44.8 113.3 -35.3 29.9
> 48.12 13.08 0:45:56. ! 45.9 115.3 -34.7 32.0
> 48.14 14.84 0:46: 8. ! 46.9 117.2 -34.0 34.1
> 48.14 16.57 0:46:19. ! 48.0 119.1 -33.3 36.0
> 48.13 18.27 0:46:31. ! 49.0 121.1 -32.6 37.9
> 48.10 19.94 0:46:43. ! 50.0 123.0 -31.9 39.8
> 48.06 21.58 0:46:55. ! 50.9 125.0 -31.2 41.6
> 48.00 23.20 0:47: 7. ! 51.9 127.0 -30.5 43.4
> 47.93 24.79 0:47:19. ! 52.8 129.0 -29.8 45.1
> 47.84 26.37 0:47:31. ! 53.7 131.1 -29.1 46.7
> 47.75 27.91 0:47:43. ! 54.5 133.2 -28.4 48.3
> 47.64 29.44 0:47:54. ! 55.4 135.3 -27.6 49.9
>
> Calculator(s): Martin Federspiel