Update for (483) Seppina - June 23/24, 2005

  • Update computed by Jan Manek;   issued 16 Jun 2005 22:10 +0200 (CEST)

  • Jan Manek's update

                         IOTA/IOTA-ES occultation update for
        (483) Seppina / UCAC2 32899392 = GSC 0420-00280 on June 23/24, 2005
                   N Bulgaria, frm. Yugoslavia, middle Italy,
                    very S France, N Spain and N Portugal
    
    Summary 

    In the night of June 23/24, 2005 a faint 11.9 mag star UCAC2 32899392 = GSC 0420-00280 will be occulted by a 74 km asteroid (483) Seppina. This update is based on USNO/Flagstaff and TMO astrometry for the asteroid and UCAC2 star position.

    The updated path shows ~0.5 path width north shift with time 0.3 minutes later compared to Edwin Goffin's nominal prediction.

    Updated path runs over N Bulgaria ~0:48.6 UT, frm. Yugoslavia around 0:49.0 UT, middle Italy ~0:49.7 UT, very S France ~0:50.5 UT, N Spain ~0:51.0 UT and N Portugal ~0:51.6 UT. Please check the path chart for details.

    Here is current station list for European cities and observatories plus other sites.
    If you would like to have your station listed with other observatories 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: June 24, 2005 @ 00:50 UT (Europe)
     * magnitude of target star: 11.9
     * magnitude drop [mag]: 1.7
     * estimated maximum duration [s]: 5.8
     * approx. V mag of minor planet at event [mag]: 13.4
     * geocentric parallax of minor planet ["]: 3.700
     * apparent motion of minor planet ["/h]: 26.42
     * angular distance to moon, phase of moon [deg,%]: 44, 95%
     * Goffin's original chart reference: A05_0647
    
    The occultation path with path maps:
     * approximate ground width [km]: 95
     * uncertainty [path widths]: 1.3
     * uncertainty in time [s]: 21
     * 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.
    
    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 NE Ophiuchus, about 30' NNE of 3.7 mag star gamma Ophiuchi = SAO 122754.
       !!! 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: UCAC2 32899392 = GSC 0420-00280
     * constellation: Ophiuchus
     * J2000 position [h,m,s; o,',"]: 17h 48m 27.3550s; +03d 07' 42.353"
     * position source: UCAC2
     * estimated 1-sigma accuracy ["]: 0.027" (0.019", 0.019")
     * V mag [mag]: 11.89 (ASAS)
     * B-V [mag]: +0.8 approx.
     * remarks:
    
    Data for the minor planet:
     * general information:
         number, name: (483) Seppina
         approx. diameter [km]: 74
     * orbital information
         orbit source: calculation Manek
         source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen)
         number of used observations: 179 USNO, 7 TMO
         number of rejected observations: 0
         time covered by the observations: 1998 02 26 - 2005 05 23
         estimated positional 2-sigma accuracy at epoch of event ["]: 0.146", 0.042", 91 deg
         remarks:
     * orbital elements
    	Semimajor axis     =   3.42195138424176
    	Eccentricity       =   0.054618994775110
    	Inclination        =  18.7438196943677 deg
    	Long. of node      = 174.1288690255890 deg
    	Arg. of pericenter = 151.8547691929752 deg
    	Mean anomaly       = 307.5926360999871 deg
    	Epoch of elements  : MJD   53545.03000000 TDT (Jun 24, 2005,  0.720000 h)
    
    Path coordinates: click here
    
    Calculator(s): Jan Manek
    
    ----------------------------------------------------------------------------
    Jan Manek
    Werichova 950
    152 00  Praha 5 - Barrandov                                         |_|_|
    Czech Republic                                                      /   \
    Internet : jan.manek AT worldonline.cz                             |-O-O-|
    --------------------------------------------------------------------U---U---
    

    Be sure to use the RELOAD button of your browser,
    so you will surely use the latest version of predictions page!