IOTA/IOTA-ES occultation update for (814) Tauris / HIP 9185 event on December 15, 1999 visible from Canary Islands and western Ireland (?) Summary
In the night December 15, 1999 a 8.8 mag star HIP 9185 = SAO 148132 will be occulted by a 116 km asteroid (814) Tauris. This update is based on USNO/Flagstaff and TMO astrometry for the asteroid and HIPPARCOS star position.
The updated path shows ~1.5 path width eastern shift with time essentially the same compared to Edwin Goffin's nominal prediction.
The path now runs over Canary Islands with Gran Canaria in the path and Teide Observatory on the western limit at ~21:56 UT. Later at ~21:58 UT the path grazes western coast of Ireland. Within errors is western half of Ireland and whole Hebrides.
The event at one glimpse: * date and approx. UT time of event: December 15, 1999 @ 21:57 UT * magnitude of target star: 8.8 * magnitude drop [mag]: 3.7 * estimated maximum duration [s]: 8.1 * path description: given above The occultation path: * approximate ground width [km]: 120 * uncertainty [path widths]: 1.0 * uncertainty in time [s]: 10 * map: attached * remarks: Path uncertainities are given according to nominal star position errors and expected asteroid positional accuracy. !!!!!!! Circles along the path are OCCULT exactly calculated centerline points. !!!!!!! Data for the target star: * name: HIP 9185 = SAO 148132 = PPM 210897 = GSC 5278.2269 * constellation: Cetus * J2000 position [h,m,s; o,',"]: 01h 58m 15.095s; -10o 41' 40.32" * position source: HIPPARCOS * estimated accuracy ["]: 0.01" (0.01", 0.01") * V mag [mag]: 8.77 * B-V [mag]: +0.99 * remarks: Target star is in middle Cetus, about 1.7 degrees east of 3.7 mag star zeta Ceti. About 31' NW from target star is 6.4 mag star SAO 148123 and 37' south of target is 6.5 mag star SAO 148139. Data for the minor planet: * general information: number, name: (814) Tauris approx. diameter [km]: 116 * orbital information orbit source: calculation Manek source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen) number of used observations: 45 USNO, 10 TMO number of rejected observations: 5 USNO, 2 TMO time covered by the observations: 1998 04 23 - 1999 12 05 rms residuals ["] (RA,DE): 0.09", 0.10" estimated positional accuracy at epoch of event ["]: 0.09" remarks: Data for the event: * UT date and time of least geocentric approach: 21:51:16 UT * approx. V mag of minor planet at event [mag]: 12.5 * geocentric parallax of minor planet ["]: 5.634 * magnitude drop [mag]: 3.7 * estimated maximum duration [s]: 8.1 * apparent motion of minor planet ["/h]: 45.46 * angular distance to moon, phase of moon [deg,%]: 37, 47% * remarks: Calculator(s): Jan ManekPath coordinates: Altitude E. Longitude Latitude U.T. star sun ........ shortened .......................... - 19 00 00 - 18 18 08 21 50 20 82 -26 - 17 00 00 + 16 12 45 21 54 40 62 -45 - 15 00 00 + 33 31 08 21 56 28 45 -50 - 13 00 00 + 43 54 50 21 57 21 35 -50 - 11 00 00 + 50 57 40 21 57 50 27 -48 - 9 00 00 + 56 05 05 21 58 07 22 -47 - 7 00 00 + 59 59 06 21 58 18 18 -45 + 5 00 00 + 71 56 44 21 58 38 5 -39 + 7 00 00 + 73 00 52 21 58 38 4 -39 ........ shortened .......................... ---------------------------------------------------------------------------- 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-| --------------------------------------------------------------------U---U---