IOTA/IOTA-ES occultation update for (569) Misa / TYC 6875-02039-1 on June 22/23, 2004 visible from S Russia, NW Turkey, Greece, Tunisia and NW Africa Summary
In the night of June 22/23, 2004 a faint 11.3 mag star TYC 6875-02039-1 will be occulted by a 76 km asteroid (569) Misa. This update is based on USNO/Flagstaff astrometry for the asteroid and UCAC2 star position.
The updated path shows ~1" south shift compared to Eric Frappa's nominal prediction.
Updated path runs over Africa ~23:35-23:42 UT. Please check the path chart for details.
There exist more than 1" difference in position Tycho-2 vs. UCAC2. This update is based on UCAC2 position. Using Tycho-2 position gives path ~1.4 path width south of Frappa's nominal path, no time shift and ~0.4" uncertainty.
Clear sky and good luck !!!
The event at one glimpse: * date and approx. UT time of event: June 22, 2004 @ 23:38 UT (Africa) * magnitude of target star: 11.3 * magnitude drop [mag]: 3.5 * estimated maximum duration [s]: 6.0 * approx. V mag of minor planet at event [mag]: 14.8 * geocentric parallax of minor planet ["]: 4.154 * apparent motion of minor planet ["/h]: 29.97 * angular distance to moon, phase of moon [deg,%]: 140, 23% * Goffin's original chart reference: A04_XXXX The occultation path with path maps: * approximate ground width [km]: 95 * uncertainty [path widths]: 1.7 * uncertainty in time [s]: 14 * map: Overview European 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. Elements for Tycho-2 position. 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 N Sagittarius, about 3.0 degrees southeast of 2.9 mag star pi Sagittarii = SAO 187756. !!! 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 6875-02039-1 * constellation: Sagittarius * J2000 position [h,m,s; o,',"]: 19h 19m 59.8243s; -22o 47' 29.526" * position source: UCAC2 * estimated accuracy ["]: 0.04" (0.03", 0.03") * V mag [mag]: 11.32 * B-V [mag]: +1.21 * remarks: There exist more than 1" difference in position Tycho-2 vs. UCAC2. This update is based on UCAC2 position. Using Tycho-2 position gives path ~1.4 path width south of Frappa's nominal path, no time shift and ~0.4" uncertainty. Data for the minor planet: * general information: number, name: (569) Misa approx. diameter [km]: 44 * orbital information orbit source: calculation Manek source of used astrometry: USNO/Flagstaff (Ron Stone) number of used observations: 84 USNO number of rejected observations: 0 time covered by the observations: 1998 03 11 - 2003 06 07 rms residuals ["] (RA,DE): 0.12", 0.12" estimated positional accuracy at epoch of event ["]: 0.11", 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-| --------------------------------------------------------------------U---U---