Update for (535) Montague - April 22/23, 2003 - South Africa

  • Update computed by Jan Manek;   issued 19 Apr 2003 20:21 +0200 (CEST)

  • Jan Manek's update

                        IOTA/IOTA-ES occultation update for
                 (535) Montague / HIP 81899 = SAO 160063 on April 22/23, 2003
                 visible from South Africa, Brazilia, N Paraguay and S Bolivia
    
    Summary 

    In the night of April 22/23, 2003 a bright 9.9 mag star HIP 81899 = SAO 160063 will be occulted by a 77 km asteroid (535) Montague. This update is based on USNO/Flagstaff astrometry for the asteroid and Hipparcos star position.

    The updated path shows ~5 path width south shift with time 0.7 minutes later compared to Edwin Goffin's nominal prediction.

    Updated path runs over South Africa 1:20-1:25 UT with Durban on north limit, later Brazilia around 1:42 UT with Sao Paulo on north limit, N Paraguay ~1:43.5 UT and S Bolivia ~1:44.2 UT. Please check the path chart for details.

    Clear sky and good luck !!!

    
    The event at one glimpse:
     * date and approx. UT time of event: April 09, 2003 @ 01:22 UT (South Africa)
                                                           01:43 UT (South America)
     * magnitude of target star: 9.9
     * magnitude drop [mag]: 3.6
     * estimated maximum duration [s]: 15.8
     * path description: given above
     * Goffin's original chart reference: A03_0447
    
    The occultation path:
     * approximate ground width [km]: 80
     * uncertainty [path widths]: 1.1
     * uncertainty in time [s]: 18
     * map: below
     * remarks: Path uncertainties are given according to nominal star
        position errors and expected asteroid positional accuracy.
    
    Data for the target star:
     * name: HIP 81899 = SAO 160063 = PPM 232082
     * constellation: Ophiuchus
     * J2000 position [h,m,s; o,',"]: 16h 43m 43.3860s; -17o 30' 53.739"
     * position source: Hipparcos
     * estimated accuracy ["]: 0.05" (0.03", 0.03")
     * V mag [mag]: 9.94
     * B-V [mag]: +0.39
     * remarks:
        Target star is in south Ophiuchus, about 34' NE of 4.9 mag star SAO 160046.
        !!! 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.
    
    Close finding chart (prepared in GUIDE8):
     * occulted star is in center - labeled with cross
     * field is 3.0x3.0 degrees
     * limiting magnitude is 13.0
     * labeled stars have indicated SAO numbers
     * remarks: Second chart is 30' blowup to show correctly the target star in the field.
    
    

    Close finding chart

    Close finding chart

    Data for the minor planet: * general information: number, name: (535) Montague approx. diameter [km]: 77 * orbital information orbit source: calculation Manek source of used astrometry: USNO/Flagstaff (Ron Stone) number of used observations: 113 USNO number of rejected observations: 12 USNO time covered by the observations: 1998 02 12 - 2003 04 08 rms residuals ["] (RA,DE): 0.08", 0.07" estimated positional accuracy at epoch of event ["]: 0.06", 0.06" remarks: Data for the event: * UT date and time of least geocentric approach: 01:23.7 UT * approx. V mag of minor planet at event [mag]: 13.5 * geocentric parallax of minor planet ["]: 5.152 * magnitude drop [mag]: 3.6 * estimated maximum duration [s]: 15.8 * apparent motion of minor planet ["/h]: 14.15 * angular distance to moon, phase of moon [deg,%]: 46, 55% * remarks: Elements for WinOccult: ============ cut here =========================================== 2003 Apr 23 535 Montague 1h 23.7m UT HIP 81899 9.9 16 43 43.386-17 30 53.74 13.5 77 15.8 1.707 -0.991 -0.38 19.313 -17.515 -201.31 12.34 1.3954 .00692 -.22674 -2.74656 -0.07340 -0.00359 0.00012 2000 82.66669292003 421.0000066.507224 84.887209 6.782884 0.023237022.569028392.509331839.485 0.15 RATE 2.3935952 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 ============ cut here =========================================== Calculator(s): Jan Manek

    Updated path location for (535) Montague on April 22/23, 2003

    Updated path location for (535) Montague on April 22/23, 2003

    Path coordinates: Centre Star Star Sun Path Limits Error Limits E. Longitude Latitude U.T. Alt Az Alt Limit 1 Limit 2 Limit 3 Limit 4 Latitude Latitude Latitude Latitude ...................................... shortened ............................................. o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " 36 0 0 -29 54 4 1 18 50 71 307 -35 -29 32 34 -30 15 36 -28 47 5 -31 1 20 35 0 0 -29 59 14 1 19 8 72 310 -36 -29 37 45 -30 20 45 -28 52 17 -31 6 29 34 0 0 -30 4 10 1 19 26 72 312 -37 -29 42 41 -30 25 40 -28 57 15 -31 11 23 33 0 0 -30 8 51 1 19 44 73 314 -38 -29 47 23 -30 30 22 -29 1 58 -31 16 3 32 0 0 -30 13 19 1 20 2 73 317 -39 -29 51 51 -30 34 48 -29 6 26 -31 20 29 31 0 0 -30 17 32 1 20 20 74 320 -39 -29 56 4 -30 39 1 -29 10 41 -31 24 41 30 0 0 -30 21 31 1 20 39 74 322 -40 -30 0 4 -30 43 0 -29 14 41 -31 28 38 29 0 0 -30 25 15 1 20 57 75 325 -41 -30 3 49 -30 46 44 -29 18 27 -31 32 22 28 0 0 -30 28 46 1 21 15 75 328 -42 -30 7 19 -30 50 14 -29 21 58 -31 35 51 27 0 0 -30 32 2 1 21 33 75 332 -42 -30 10 36 -30 53 29 -29 25 15 -31 39 6 26 0 0 -30 35 3 1 21 51 76 335 -43 -30 13 38 -30 56 31 -29 28 18 -31 42 7 25 0 0 -30 37 51 1 22 9 76 339 -44 -30 16 25 -30 59 18 -29 31 6 -31 44 53 24 0 0 -30 40 24 1 22 27 76 342 -45 -30 18 59 -31 1 51 -29 33 40 -31 47 25 23 0 0 -30 42 43 1 22 46 76 346 -45 -30 21 18 -31 4 9 -29 36 0 -31 49 43 22 0 0 -30 44 47 1 23 4 77 350 -46 -30 23 22 -31 6 13 -29 38 5 -31 51 47 21 0 0 -30 46 37 1 23 22 77 353 -47 -30 25 13 -31 8 3 -29 39 56 -31 53 36 20 0 0 -30 48 13 1 23 40 77 357 -48 -30 26 49 -31 9 39 -29 41 32 -31 55 12 19 0 0 -30 49 34 1 23 58 77 1 -48 -30 28 10 -31 11 0 -29 42 54 -31 56 32 18 0 0 -30 50 41 1 24 17 77 5 -49 -30 29 17 -31 12 7 -29 44 1 -31 57 39 17 0 0 -30 51 34 1 24 35 76 9 -50 -30 30 10 -31 13 0 -29 44 54 -31 58 31 16 0 0 -30 52 12 1 24 53 76 13 -51 -30 30 48 -31 13 38 -29 45 33 -31 59 9 15 0 0 -30 52 36 1 25 11 76 16 -51 -30 31 12 -31 14 2 -29 45 57 -31 59 33 14 0 0 -30 52 46 1 25 29 76 20 -52 -30 31 22 -31 14 11 -29 46 6 -31 59 43 13 0 0 -30 52 41 1 25 47 76 23 -53 -30 31 17 -31 14 6 -29 46 2 -31 59 38 12 0 0 -30 52 22 1 26 5 75 27 -54 -30 30 58 -31 13 47 -29 45 42 -31 59 19 11 0 0 -30 51 48 1 26 23 75 30 -54 -30 30 24 -31 13 14 -29 45 8 -31 58 45 ...................................... shortened ............................................. - 39 0 0 -25 19 33 1 39 55 39 93 -72 -24 57 40 -25 41 28 -24 11 21 -26 28 3 - 40 0 0 -25 6 58 1 40 8 38 93 -71 -24 45 4 -25 28 54 -23 58 43 -26 15 31 - 41 0 0 -24 54 10 1 40 21 37 94 -71 -24 32 15 -25 16 7 -23 45 52 -26 2 46 - 42 0 0 -24 41 9 1 40 33 37 94 -70 -24 19 13 -25 3 7 -23 32 48 -25 49 48 - 43 0 0 -24 27 55 1 40 45 36 95 -70 -24 5 58 -24 49 54 -23 19 31 -25 36 37 - 44 0 0 -24 14 28 1 40 58 35 95 -69 -23 52 30 -24 36 28 -23 6 1 -25 23 13 - 45 0 0 -24 0 49 1 41 9 34 96 -68 -23 38 49 -24 22 50 -22 52 19 -25 9 37 - 46 0 0 -23 46 56 1 41 21 33 96 -68 -23 24 56 -24 8 58 -22 38 24 -24 55 47 - 47 0 0 -23 32 52 1 41 33 32 97 -67 -23 10 51 -23 54 55 -22 24 16 -24 41 46 - 48 0 0 -23 18 35 1 41 44 31 97 -66 -22 56 33 -23 40 38 -22 9 56 -24 27 32 - 49 0 0 -23 4 5 1 41 55 30 98 -66 -22 42 2 -23 26 10 -21 55 24 -24 13 5 - 50 0 0 -22 49 24 1 42 5 29 98 -65 -22 27 20 -23 11 30 -21 40 40 -23 58 27 - 51 0 0 -22 34 31 1 42 16 29 98 -64 -22 12 26 -22 56 37 -21 25 43 -23 43 36 - 52 0 0 -22 19 26 1 42 26 28 99 -63 -21 57 20 -22 41 33 -21 10 35 -23 28 34 - 53 0 0 -22 4 9 1 42 36 27 99 -63 -21 42 2 -22 26 17 -20 55 16 -23 13 20 - 54 0 0 -21 48 41 1 42 45 26 100 -62 -21 26 33 -22 10 50 -20 39 45 -22 57 55 - 55 0 0 -21 33 1 1 42 55 25 100 -61 -21 10 53 -21 55 12 -20 24 3 -22 42 18 - 56 0 0 -21 17 11 1 43 4 24 100 -60 -20 55 1 -21 39 22 -20 8 9 -22 26 31 - 57 0 0 -21 1 9 1 43 13 23 101 -59 -20 38 59 -21 23 21 -19 52 5 -22 10 32 - 58 0 0 -20 44 57 1 43 21 22 101 -58 -20 22 46 -21 7 10 -19 35 50 -21 54 22 - 59 0 0 -20 28 34 1 43 29 21 102 -58 -20 6 22 -20 50 48 -19 19 25 -21 38 2 - 60 0 0 -20 12 1 1 43 37 20 102 -57 -19 49 48 -20 34 16 -19 2 49 -21 21 31 - 61 0 0 -19 55 18 1 43 45 19 102 -56 -19 33 4 -20 17 33 -18 46 3 -21 4 51 - 62 0 0 -19 38 25 1 43 52 18 103 -55 -19 16 11 -20 0 41 -18 29 8 -20 48 0 - 63 0 0 -19 21 22 1 43 59 17 103 -54 -18 59 7 -19 43 39 -18 12 3 -20 31 0 - 64 0 0 -19 4 10 1 44 5 16 103 -53 -18 41 54 -19 26 28 -17 54 48 -20 13 50 - 65 0 0 -18 46 49 1 44 11 15 104 -52 -18 24 32 -19 9 7 -17 37 25 -19 56 31 - 66 0 0 -18 29 18 1 44 17 14 104 -51 -18 7 1 -18 51 37 -17 19 52 -19 39 3 - 67 0 0 -18 11 39 1 44 23 13 104 -51 -17 49 22 -18 33 59 -17 2 11 -19 21 26 - 68 0 0 -17 53 52 1 44 28 12 105 -50 -17 31 34 -18 16 13 -16 44 22 -19 3 41 - 69 0 0 -17 35 57 1 44 33 11 105 -49 -17 13 38 -17 58 18 -16 26 25 -18 45 47 - 70 0 0 -17 17 54 1 44 37 10 105 -48 -16 55 34 -17 40 15 -16 8 19 -18 27 46 - 71 0 0 -16 59 43 1 44 41 10 106 -47 -16 37 23 -17 22 5 -15 50 7 -18 9 37 - 72 0 0 -16 41 25 1 44 45 9 106 -46 -16 19 4 -17 3 48 -15 31 47 -17 51 21 - 73 0 0 -16 23 0 1 44 48 8 106 -45 -16 0 39 -16 45 24 -15 13 21 -17 32 58 - 74 0 0 -16 4 29 1 44 51 7 106 -44 -15 42 7 -16 26 53 -14 54 48 -17 14 28 - 75 0 0 -15 45 52 1 44 53 6 107 -43 -15 23 29 -16 8 16 -14 36 9 -16 55 52 - 76 0 0 -15 27 8 1 44 56 5 107 -42 -15 4 45 -15 49 33 -14 17 25 -16 37 10 - 77 0 0 -15 8 19 1 44 57 4 107 -41 -14 45 56 -15 30 44 -13 58 34 -16 18 22 ...................................... 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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