IOTA/IOTA-ES occultation update for (493) Griseldis / TYC 2895-02760-1 = SAO 57651 on September 17/18, 2002 visible from Tunisia, Italy, Austria, Germany, Denmark, W Norway and Iceland Summary
In the night of September 17/18, 2002 an 8.6 mag star TYC 2895-02760-1 = SAO 57651 will be occulted by a 52 km asteroid (493) Griseldis. This update is based on USNO/Flagstaff and Mt.Palomar astrometry for the asteroid and Tycho-2 star position.
The updated path shows ~4 path widths west shift with time ~0.2 minutes earlier compared to Edwin Goffin's nominal prediction.
Updated path runs over Tunisia ~22:01.4 UT, Italy with Rome on east limit ~22:02 UT, W Austria ~22:02.3 UT,
Germany around 22:02.7 UT with Munich in path, Denmark ~22:03.3 UT, W Norway ~22:03.6 UT and Iceland ~22:05 UT.
There is no recent oposition astrometry for this event so uncertainty may be as large as indicated.
Observers within this area should try to observe.
Please check the path chart for details.
Clear sky and good luck !!!
The event at one glimpse: * date and approx. UT time of event: September 17, 2002 @ 22:02 UT * magnitude of target star: 8.6 * magnitude drop [mag]: 6.7 * estimated maximum duration [s]: 3.1 * path description: given above * Goffin's original chart reference: A02_0942 The occultation path: * approximate ground width [km]: 125 * uncertainty [path widths]: 3.9 * uncertainty in time [s]: 12 * map: below * remarks: Path uncertainties are given according to nominal star position errors and expected asteroid positional accuracy. Data for the target star: * name: TYC 2895-02760-1 = SAO 57651 = PPM 69938 * constellation: Auriga * J2000 position [h,m,s; o,',"]: 05h 07m 36.9542s; +37o 37' 52.635" * position source: Tycho-2 * estimated accuracy ["]: 0.03" (0.02", 0.02") * V mag [mag]: 8.61 * B-V [mag]: +0.28 * remarks: Target star is in northwest Auriga, about 1.4 degrees southwest of 4.8 mag star mui Aurigae = SAO 57755. !!! 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 GUIDE7): * occulted star is in center - labeled with cross * field is 3.0x3.0 degrees * limiting magnitude is 12.0 * labeled stars have indicated SAO numbers * remarks:
Data for the minor planet: * general information: number, name: (493) Griseldis approx. diameter [km]: 52 * orbital information orbit source: calculation Manek source of used astrometry: USNO/Flagstaff (Ron Stone), Mt.Palomar number of used observations: 52 USNO, 1 Bordeaux number of rejected observations: 13 USNO time covered by the observations: 1990 09 17 - 2001 11 18 rms residuals ["] (RA,DE): 0.17", 0.13" estimated positional accuracy at epoch of event ["]: 0.10", 0.11" remarks: No recent opposition astrometry. Data for the event: * UT date and time of least geocentric approach: 22:03.6 UT * approx. V mag of minor planet at event [mag]: 15.3 * geocentric parallax of minor planet ["]: 3.779 * magnitude drop [mag]: 6.7 * estimated maximum duration [s]: 3.1 * apparent motion of minor planet ["/h]: 36.00 * angular distance to moon, phase of moon [deg,%]: 125, 88% * remarks: Elements for WinOccult: ============ cut here =========================================== 2002 Sep 17 493 Griseldis 22h 3.6m UT 95-02760-1 8.6 5 7 36.954 37 37 52.64TYC 2895-02760-1 15.3 52 3.1 2.327 2.500 20.32 -250.660 37.626 -152.30 2.05 22.0599 -.51041 .74653 7.86190 5.37706 -0.00554 -0.00066 2000 8.292247702002 913.0000046.568761 357.61469915.146036 0.165036413.125165522.6093994210.35 0.15 RATE 1.7839987 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 ============ cut here =========================================== Calculator(s): Jan Manek
Path coordinates: Center Altitude Path Limits E. Longitude Latitude U.T. star sun Limit 1 Limit 2 ........................... shortened ............................. o ' " o ' " h m s o o o ' " o ' " Longitude Longitude 5 26 23 29 0 0 22 1 1 7 -52 6 12 43 4 38 49 6 12 30 30 0 0 22 1 4 8 -52 6 58 5 5 25 44 6 55 15 31 0 0 22 1 7 9 -51 7 40 15 6 9 9 7 34 51 32 0 0 22 1 10 10 -51 8 19 24 6 49 16 8 11 27 33 0 0 22 1 13 11 -50 8 55 38 7 26 16 8 45 11 34 0 0 22 1 17 12 -50 9 29 7 8 0 17 9 16 8 35 0 0 22 1 20 13 -49 9 59 54 8 31 25 9 44 22 36 0 0 22 1 24 14 -48 10 28 4 8 59 45 10 9 57 37 0 0 22 1 29 15 -48 10 53 40 9 25 20 10 32 55 38 0 0 22 1 33 16 -47 11 16 43 9 48 13 10 53 15 39 0 0 22 1 37 17 -46 11 37 13 10 8 23 11 10 58 40 0 0 22 1 42 17 -45 11 55 11 10 25 51 11 26 1 41 0 0 22 1 47 18 -44 12 10 35 10 40 35 11 38 24 42 0 0 22 1 52 19 -44 12 23 21 10 52 32 11 48 0 43 0 0 22 1 57 19 -43 12 33 28 11 1 38 11 54 47 44 0 0 22 2 3 20 -42 12 40 49 11 7 48 11 58 36 45 0 0 22 2 8 21 -41 12 45 19 11 10 56 11 59 21 46 0 0 22 2 14 21 -40 12 46 51 11 10 52 11 56 53 47 0 0 22 2 19 22 -39 12 45 15 11 7 28 11 50 59 48 0 0 22 2 25 22 -38 12 40 21 11 0 32 11 41 27 49 0 0 22 2 31 23 -37 12 31 57 10 49 48 11 28 0 50 0 0 22 2 37 23 -36 12 19 48 10 35 0 11 10 20 51 0 0 22 2 44 24 -35 12 3 35 10 15 49 10 48 5 52 0 0 22 2 50 24 -34 11 42 59 9 51 48 10 20 47 53 0 0 22 2 57 24 -33 11 17 33 9 22 30 9 47 54 54 0 0 22 3 3 24 -32 10 46 48 8 47 19 Latitude Latitude 8 0 0 56 26 4 22 3 21 25 -29 57 37 7 55 7 13 7 0 0 57 27 44 22 3 28 25 -28 58 32 7 56 17 45 6 0 0 58 20 41 22 3 35 25 -27 59 20 4 57 16 59 5 0 0 59 6 60 22 3 41 25 -26 60 2 28 58 8 2 4 0 0 59 48 2 22 3 47 25 -26 60 40 21 58 52 49 3 0 0 60 24 44 22 3 52 25 -25 61 14 27 59 32 34 2 0 0 60 57 49 22 3 57 25 -24 61 45 21 60 8 10 1 0 0 61 27 48 22 4 1 25 -23 62 13 27 60 40 16 0 0 0 61 55 5 22 4 5 24 -23 62 39 7 61 9 21 - 1 0 0 62 19 59 22 4 9 24 -22 63 2 37 61 35 50 - 2 0 0 62 42 46 22 4 13 24 -22 63 24 9 61 59 59 - 3 0 0 63 3 39 22 4 17 24 -21 63 43 57 62 22 4 - 4 0 0 63 22 48 22 4 20 24 -21 64 2 8 62 42 17 - 5 0 0 63 40 23 22 4 24 24 -20 64 18 51 63 0 49 - 6 0 0 63 56 31 22 4 27 23 -20 64 34 13 63 17 47 - 7 0 0 64 11 18 22 4 30 23 -19 64 48 19 63 33 19 - 8 0 0 64 24 51 22 4 33 23 -19 65 1 14 63 47 31 - 9 0 0 64 37 12 22 4 36 23 -18 65 13 3 64 0 29 - 10 0 0 64 48 28 22 4 39 23 -18 65 23 49 64 12 16 - 11 0 0 64 58 41 22 4 41 22 -17 65 33 35 64 22 58 - 12 0 0 65 7 55 22 4 44 22 -17 65 42 26 64 32 37 - 13 0 0 65 16 12 22 4 47 22 -17 65 50 22 64 41 16 - 14 0 0 65 23 34 22 4 49 22 -16 65 57 26 64 48 58 - 15 0 0 65 30 4 22 4 52 22 -16 66 3 40 64 55 45 - 16 0 0 65 35 44 22 4 54 21 -16 66 9 5 65 1 39 - 17 0 0 65 40 33 22 4 56 21 -15 66 13 44 65 6 41 - 18 0 0 65 44 35 22 4 59 21 -15 66 17 36 65 10 53 - 19 0 0 65 47 50 22 5 1 21 -15 66 20 43 65 14 15 - 20 0 0 65 50 18 22 5 3 21 -14 66 23 5 65 16 50 - 21 0 0 65 52 1 22 5 6 20 -14 66 24 44 65 18 36 - 22 0 0 65 52 58 22 5 8 20 -14 66 25 39 65 19 35 - 23 0 0 65 53 10 22 5 10 20 -13 66 25 51 65 19 48 - 24 0 0 65 52 37 22 5 12 20 -13 66 25 20 65 19 13 - 25 0 0 65 51 19 22 5 14 19 -13 66 24 5 65 17 51 - 26 0 0 65 49 15 22 5 16 19 -12 66 22 7 65 15 41 - 27 0 0 65 46 25 22 5 18 19 -12 66 19 24 65 12 43 - 28 0 0 65 42 48 22 5 20 18 -12 66 15 57 65 8 57 - 29 0 0 65 38 24 22 5 22 18 -11 66 11 43 65 4 20 - 30 0 0 65 33 10 22 5 25 18 -11 66 6 43 64 58 53 - 31 0 0 65 27 7 22 5 27 18 -11 66 0 55 64 52 32 - 32 0 0 65 20 11 22 5 29 17 -10 65 54 18 64 45 18 - 33 0 0 65 12 22 22 5 31 17 -10 65 46 49 64 37 7 - 34 0 0 65 3 37 22 5 33 17 -10 65 38 27 64 27 57 - 35 0 0 64 53 53 22 5 35 16 -10 65 29 10 64 17 45 - 36 0 0 64 43 8 22 5 37 16 -9 65 18 54 64 6 29 - 37 0 0 64 31 18 22 5 39 15 -9 65 7 36 63 54 3 - 38 0 0 64 18 19 22 5 41 15 -9 64 55 14 63 40 25 - 39 0 0 64 4 7 22 5 43 15 -8 64 41 42 63 25 28 - 40 0 0 63 48 35 22 5 45 14 -8 64 26 56 63 9 7 - 41 0 0 63 31 39 22 5 47 14 -8 64 10 51 62 51 14 - 42 0 0 63 13 10 22 5 49 13 -7 63 53 20 62 31 43 - 43 0 0 62 53 0 22 5 51 13 -7 63 34 15 62 10 22 - 44 0 0 62 30 60 22 5 53 12 -7 63 13 27 61 46 60 - 45 0 0 62 6 55 22 5 55 12 -6 62 50 47 61 21 22 - 46 0 0 61 40 32 22 5 57 11 -6 62 25 59 60 53 12 - 47 0 0 61 11 32 22 5 59 11 -6 61 58 50 60 22 6 - 48 0 0 60 39 31 22 6 1 10 -5 61 28 59 59 47 36 - 49 0 0 60 3 60 22 6 3 9 -5 60 56 1 59 9 4 - 50 0 0 59 24 17 22 6 5 8 -5 60 19 25 58 25 41 - 51 0 0 58 39 30 22 6 7 8 -4 59 38 27 57 36 13 ........................... 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---
IOTA/IOTA-ES occultation update for (493) Griseldis / TYC 2895-02760-1 = SAO 57651 on September 17/18, 2002 visible from Tunisia, Italy, Austria, Germany, Denmark, W Norway and Iceland Summary
In the night of September 17/18, 2002 an 8.6 mag star TYC 2895-02760-1 = SAO 57651 will be occulted by a 52 km asteroid (493) Griseldis. This update is based on USNO/Flagstaff and Mt.Palomar astrometry for the asteroid and Tycho-2 star position.
The updated path shows ~3 path widths west shift with time ~0.3 minutes earlier compared to Edwin Goffin's nominal prediction. Compared to first update this is one path width to east and 0.1 minutes time correction.
Updated path runs over Tunisia ~22:01.4 UT, Italy with Rome on west limit ~22:02 UT, W Austria ~22:02.3 UT,
Germany around 22:02.7 UT with Berlin in path, W Czechia with Prague on east limit, Denmark ~22:03.3 UT,
W Norway ~22:03.6 UT and Iceland ~22:05 UT.
Observers within this area should try to observe.
Please check the path chart for details.
Clear sky and good luck !!!
The event at one glimpse: * date and approx. UT time of event: September 17, 2002 @ 22:02 UT * magnitude of target star: 8.6 * magnitude drop [mag]: 6.7 * estimated maximum duration [s]: 3.1 * path description: given above * Goffin's original chart reference: A02_0942 The occultation path: * approximate ground width [km]: 125 * uncertainty [path widths]: 2.8 * uncertainty in time [s]: 9 * map: below * remarks: Path uncertainties are given according to nominal star position errors and expected asteroid positional accuracy. Data for the target star: * name: TYC 2895-02760-1 = SAO 57651 = PPM 69938 * constellation: Auriga * J2000 position [h,m,s; o,',"]: 05h 07m 36.9542s; +37o 37' 52.635" * position source: Tycho-2 * estimated accuracy ["]: 0.03" (0.02", 0.02") * V mag [mag]: 8.61 * B-V [mag]: +0.28 * remarks: Target star is in northwest Auriga, about 1.4 degrees southwest of 4.8 mag star mui Aurigae = SAO 57755. !!! 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 GUIDE7): * occulted star is in center - labeled with cross * field is 3.0x3.0 degrees * limiting magnitude is 12.0 * labeled stars have indicated SAO numbers * remarks:
Data for the minor planet: * general information: number, name: (493) Griseldis approx. diameter [km]: 52 * orbital information orbit source: calculation Manek source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen), Mt.Palomar number of used observations: 52 USNO, 3 TMO, 1 Bordeaux number of rejected observations: 13 USNO time covered by the observations: 1990 09 17 - 2002 09 13 rms residuals ["] (RA,DE): 0.16", 0.12" estimated positional accuracy at epoch of event ["]: 0.07", 0.07" remarks: One night recent opposition astrometry from Bill Owen. Data for the event: * UT date and time of least geocentric approach: 22:03.6 UT * approx. V mag of minor planet at event [mag]: 15.3 * geocentric parallax of minor planet ["]: 3.779 * magnitude drop [mag]: 6.7 * estimated maximum duration [s]: 3.1 * apparent motion of minor planet ["/h]: 36.00 * angular distance to moon, phase of moon [deg,%]: 125, 88% * remarks: Elements for WinOccult: ============ cut here =========================================== 2002 Sep 17 493 Griseldis 22h 3.5m UT 95-02760-1 8.6 5 7 36.954 37 37 52.64TYC 2895-02760-1 15.3 52 3.1 2.327 2.500 20.32 -250.630 37.626 -152.27 2.05 22.0580 -.50486 .73841 7.86192 5.37707 -0.00554 -0.00066 2000 8.292279672002 913.0000046.568733 357.61470115.146036 0.165036463.125165482.6093992210.35 0.15 RATE 1.7839987 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 ============ cut here =========================================== Calculator(s): Jan Manek
Path coordinates: Center Altitude Path Limits E. Longitude Latitude U.T. star sun Limit 1 Limit 2 ........................... shortened ............................. o ' " o ' " h m s o o o ' " o ' " Longitude Longitude 7 18 1 29 0 0 22 0 49 8 -53 8 1 44 6 33 17 8 2 29 30 0 0 22 0 52 9 -53 8 45 37 7 18 23 8 43 54 31 0 0 22 0 55 10 -52 9 26 34 8 0 19 9 22 28 32 0 0 22 0 58 11 -52 10 4 46 8 39 17 9 58 16 33 0 0 22 1 1 12 -51 10 40 18 9 15 23 10 31 26 34 0 0 22 1 5 13 -50 11 13 17 9 48 46 11 2 2 35 0 0 22 1 9 14 -50 11 43 47 10 19 30 11 30 8 36 0 0 22 1 13 15 -49 12 11 51 10 47 39 11 55 46 37 0 0 22 1 17 16 -48 12 37 31 11 13 15 12 18 58 38 0 0 22 1 22 17 -47 13 0 50 11 36 20 12 39 43 39 0 0 22 1 27 18 -47 13 21 46 11 56 55 12 58 2 40 0 0 22 1 31 18 -46 13 40 20 12 14 59 13 13 54 41 0 0 22 1 36 19 -45 13 56 31 12 30 31 13 27 14 42 0 0 22 1 41 20 -44 14 10 15 12 43 27 13 38 1 43 0 0 22 1 47 21 -43 14 21 30 12 53 46 13 46 10 44 0 0 22 1 52 21 -42 14 30 11 13 1 21 13 51 35 45 0 0 22 1 57 22 -41 14 36 14 13 6 8 13 54 10 46 0 0 22 2 3 22 -40 14 39 31 13 7 58 13 53 45 47 0 0 22 2 9 23 -39 14 39 55 13 6 43 13 50 13 48 0 0 22 2 15 23 -39 14 37 17 13 2 14 13 43 20 49 0 0 22 2 21 24 -38 14 31 25 12 54 17 13 32 53 50 0 0 22 2 27 24 -37 14 22 7 12 42 38 13 18 36 51 0 0 22 2 33 25 -36 14 9 8 12 27 0 13 0 10 52 0 0 22 2 39 25 -35 13 52 9 12 7 3 12 37 13 53 0 0 22 2 46 25 -34 13 30 50 11 42 22 12 9 17 54 0 0 22 2 52 26 -33 13 4 44 11 12 28 11 35 49 55 0 0 22 2 59 26 -31 12 33 23 10 36 46 Latitude Latitude 10 0 0 57 11 10 22 3 15 26 -29 58 21 60 55 52 46 9 0 0 58 14 51 22 3 22 26 -28 59 18 50 57 5 25 8 0 0 59 9 24 22 3 29 26 -27 60 8 17 58 6 21 7 0 0 59 57 4 22 3 35 26 -26 60 51 59 58 58 49 6 0 0 60 39 17 22 3 41 26 -25 61 31 0 59 44 49 5 0 0 61 17 3 22 3 46 26 -24 62 6 8 60 25 39 4 0 0 61 51 7 22 3 51 26 -24 62 37 58 61 2 15 3 0 0 62 22 1 22 3 56 26 -23 63 6 58 61 35 17 2 0 0 62 50 9 22 3 60 26 -22 63 33 28 62 5 16 1 0 0 63 15 53 22 4 4 26 -22 63 57 46 62 32 35 0 0 0 63 39 29 22 4 8 25 -21 64 20 6 62 57 34 - 1 0 0 64 1 9 22 4 11 25 -21 64 40 39 63 20 27 - 2 0 0 64 21 5 22 4 15 25 -20 64 59 36 63 41 28 - 3 0 0 64 39 27 22 4 18 25 -20 65 17 4 64 0 47 - 4 0 0 64 56 21 22 4 21 25 -19 65 33 11 64 18 33 - 5 0 0 65 11 56 22 4 24 25 -19 65 48 3 64 34 54 - 6 0 0 65 26 15 22 4 27 24 -18 66 1 44 64 49 55 - 7 0 0 65 39 26 22 4 30 24 -18 66 14 20 65 3 43 - 8 0 0 65 51 31 22 4 33 24 -18 66 25 54 65 16 21 - 9 0 0 66 2 35 22 4 36 24 -17 66 36 30 65 27 55 - 10 0 0 66 12 41 22 4 38 24 -17 66 46 11 65 38 28 - 11 0 0 66 21 51 22 4 41 23 -16 66 54 59 65 48 2 - 12 0 0 66 30 9 22 4 43 23 -16 67 2 56 65 56 42 - 13 0 0 66 37 37 22 4 46 23 -16 67 10 6 66 4 28 - 14 0 0 66 44 15 22 4 48 23 -15 67 16 29 66 11 23 - 15 0 0 66 50 7 22 4 50 23 -15 67 22 7 66 17 30 - 16 0 0 66 55 13 22 4 53 22 -15 67 27 1 66 22 48 - 17 0 0 66 59 35 22 4 55 22 -14 67 31 13 66 27 21 - 18 0 0 67 3 13 22 4 57 22 -14 67 34 43 66 31 8 - 19 0 0 67 6 9 22 4 59 22 -14 67 37 32 66 34 10 - 20 0 0 67 8 23 22 5 1 21 -13 67 39 41 66 36 30 - 21 0 0 67 9 55 22 5 3 21 -13 67 41 10 66 38 5 - 22 0 0 67 10 47 22 5 6 21 -13 67 41 60 66 38 59 - 23 0 0 67 10 57 22 5 8 21 -12 67 42 10 66 39 9 - 24 0 0 67 10 27 22 5 10 21 -12 67 41 41 66 38 37 - 25 0 0 67 9 15 22 5 12 20 -12 67 40 33 66 37 23 - 26 0 0 67 7 23 22 5 14 20 -12 67 38 45 66 35 25 - 27 0 0 67 4 48 22 5 16 20 -11 67 36 17 66 32 44 - 28 0 0 67 1 32 22 5 18 19 -11 67 33 8 66 29 19 - 29 0 0 66 57 32 22 5 20 19 -11 67 29 18 66 25 9 - 30 0 0 66 52 48 22 5 22 19 -10 67 24 46 66 20 12 - 31 0 0 66 47 19 22 5 23 19 -10 67 19 31 66 14 29 - 32 0 0 66 41 4 22 5 25 18 -10 67 13 31 66 7 57 - 33 0 0 66 34 1 22 5 27 18 -10 67 6 45 66 0 35 - 34 0 0 66 26 7 22 5 29 18 -9 66 59 12 65 52 21 - 35 0 0 66 17 22 22 5 31 17 -9 66 50 49 65 43 12 - 36 0 0 66 7 42 22 5 33 17 -9 66 41 34 65 33 5 - 37 0 0 65 57 6 22 5 35 17 -8 66 31 25 65 21 59 - 38 0 0 65 45 28 22 5 37 16 -8 66 20 19 65 9 49 - 39 0 0 65 32 47 22 5 39 16 -8 66 8 12 64 56 31 - 40 0 0 65 18 58 22 5 41 16 -7 65 55 1 64 42 1 - 41 0 0 65 3 56 22 5 43 15 -7 65 40 41 64 26 13 - 42 0 0 64 47 36 22 5 45 15 -7 65 25 8 64 9 2 - 43 0 0 64 29 50 22 5 47 14 -7 65 8 15 63 50 19 - 44 0 0 64 10 32 22 5 49 14 -6 64 49 55 63 29 56 - 45 0 0 63 49 32 22 5 51 13 -6 64 30 2 63 7 44 - 46 0 0 63 26 40 22 5 53 13 -6 64 8 24 62 43 29 - 47 0 0 63 1 43 22 5 55 12 -5 63 44 52 62 16 57 - 48 0 0 62 34 25 22 5 57 12 -5 63 19 12 61 47 50 - 49 0 0 62 4 26 22 5 59 11 -5 62 51 6 61 15 44 - 50 0 0 61 31 23 22 6 1 10 -4 62 20 14 60 40 10 - 51 0 0 60 54 43 22 6 3 10 -4 61 46 11 60 0 28 ........................... 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---