Update for (479) Caprera - November 30/December 1, 2000

  • Update computed by Jan Manek;   issued 29 Nov 2000 23:47:20 +0100 (CET)

  • Jan Manek's update

                        IOTA/IOTA-ES occultation update for
          (479) Caprera / TYC 0741-00076-1 on Nov 30/December 1, 2000
           visible from very N Russia/Finland/Sweden/Norway/Greenland
    
    Summary 

    In the night of November 30/December 1, 2000 a 9.7 mag star TYC 0741-00076-1 will be occulted by a 78 km asteroid (479) Caprera. This update is based on USNO/Flagstaff and TMO astrometry for the asteroid and Tycho-2 star position.

    The updated path shows ~4 path width north shift and time ~0.8 minutes later compared to Edwin Goffin's nominal prediction.

    The path of this occultation runs over very N Russia ~3:59 UT and then grazes N coast of Finland, Sweden and Norway around 4:00 UT. Later also N parts of Greenland is in path and some islands in north Canada. Most likely there are no potential observers there.

    
    The event at one glimpse:
     * date and approx. UT time of event: December 1, 2000 @ 04:00 UT (Euro)
     * magnitude of target star: 9.7
     * magnitude drop [mag]: 3.1
     * estimated maximum duration [s]: 12.9
     * path description: given above
     * Goffin's original chart reference: A00_1229
    
    The occultation path:
     * approximate ground width [km]: 210
     * uncertainty [path widths]: 1.5
     * uncertainty in time [s]: 20
     * map: below
     * remarks: Path uncertainities are given according to nominal star
        position errors and expected asteroid positional accuracy.
        !!!!!!!
        Circles along path indicates the centerline for this event.
        They are more accurate than the path limit lines.
        !!!!!!!
    
    Data for the target star:
     * name: TYC 0741-00076-1
     * constellation: Monoceros
     * J2000 position [h,m,s; o,',"]: 06h 35m 15.106s; +11o 50' 08.81"
     * position source: Tycho-2
     * estimated accuracy ["]: 0.04" (0.03", 0.03")
     * V mag [mag]: 9.70
     * B-V [mag]: +0.47
     * remarks: 
         Target star is in north Monoceros, on board with Gemini, about 4.6
         degrees south of 2.0 mag star gamma Geminorum = SAO 95912.
    
    Close finding chart (prepared in GUIDE7):
     * occulted star is in center - labeled with cross
     * field is 2.5x2.5 degrees
     * limiting magnitude is 12.5
     * labeled stars have indicated SAO numbers
    
    

    Close finding chart Data for the minor planet: * general information: number, name: (479) Caprera approx. diameter [km]: 78 * orbital information orbit source: calculation Manek source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen) number of used observations: 43 USNO, 9 TMO number of rejected observations: 2 USNO, 1 TMO time covered by the observations: 1998 02 26 - 2000 11 20 rms residuals ["] (RA,DE): 0.09", 0.09" estimated positional accuracy at epoch of event ["]: 0.10" remarks: Data for the event: * UT date and time of least geocentric approach: 04:04.0 UT * approx. V mag of minor planet at event [mag]: 12.7 * geocentric parallax of minor planet ["]: 6.708 * magnitude drop [mag]: 3.1 * estimated maximum duration [s]: 12.9 * apparent motion of minor planet ["/h]: 22.91 * angular distance to moon, phase of moon [deg,%]: 150, 23% * remarks: Calculator(s): Jan Manek

    Updated path location for (479) Caprera on November 30/December 1, 2000 Path coordinates: Altitude E. Longitude Latitude U.T. star sun ........ shortened .......................... o ' " o ' " h m s o o 60 0 0 64 0 8 3 58 10 10 -7 55 0 0 65 22 50 3 58 34 12 -9 50 0 0 66 45 60 3 59 1 14 -12 45 0 0 68 8 28 3 59 31 16 -14 40 0 0 69 29 10 4 0 3 17 -16 35 0 0 70 47 7 4 0 35 19 -18 30 0 0 72 1 26 4 1 7 20 -20 25 0 0 73 11 26 4 1 38 21 -21 20 0 0 74 16 35 4 2 9 21 -23 15 0 0 75 16 33 4 2 38 22 -24 10 0 0 76 11 12 4 3 5 22 -25 5 0 0 77 0 32 4 3 31 22 -26 0 0 0 77 44 42 4 3 55 22 -27 - 5 0 0 78 23 55 4 4 17 22 -27 - 10 0 0 78 58 28 4 4 38 22 -28 - 15 0 0 79 28 42 4 4 57 22 -28 - 20 0 0 79 54 54 4 5 15 22 -29 - 25 0 0 80 17 24 4 5 31 21 -29 - 30 0 0 80 36 30 4 5 47 21 -29 - 35 0 0 80 52 26 4 6 2 21 -30 - 40 0 0 81 5 25 4 6 16 21 -30 - 45 0 0 81 15 40 4 6 29 20 -30 - 50 0 0 81 23 19 4 6 42 20 -30 - 55 0 0 81 28 28 4 6 55 20 -30 - 60 0 0 81 31 13 4 7 7 19 -30 - 65 0 0 81 31 35 4 7 18 19 -30 - 70 0 0 81 29 34 4 7 30 19 -30 - 75 0 0 81 25 10 4 7 41 18 -30 - 80 0 0 81 18 17 4 7 53 18 -30 - 85 0 0 81 8 49 4 8 4 17 -30 - 90 0 0 80 56 39 4 8 16 17 -30 - 95 0 0 80 41 35 4 8 27 16 -30 -100 0 0 80 23 24 4 8 39 16 -30 -105 0 0 80 1 51 4 8 51 15 -29 -110 0 0 79 36 37 4 9 3 14 -29 -115 0 0 79 7 25 4 9 15 13 -28 -120 0 0 78 33 52 4 9 27 12 -28 -125 0 0 77 55 37 4 9 39 11 -27 -130 0 0 77 12 21 4 9 50 10 -27 -135 0 0 76 23 46 4 10 2 9 -26 ........ shortened .......................... ---------------------------------------------------------------------------- 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@worldonline.cz |-O-O-| --------------------------------------------------------------------U---U---

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