IOTA/IOTA-ES occultation update for (3709) Polypoites / 2UCAC 30608824 event on 2007 Nov 01, 00:46 UT Visible from Argentina, Chile Summary ------- On 2007 Nov 01 UT, the 99 km diameter asteroid (3709) Polypoites will occult a 10.9 mag star in the constellation Aquila for observers along a path across Argentina, Chile. In the case of an occultation, the combined light of the asteroid and the star will drop by 6.0 mag to 16.9 mag (the magnitude of the asteroid) for at most 6.3 seconds. This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Alice Monet, historical astrometry from the MPC files (via AstDys), and the following catalogs for the star position: UCAC. The event at a glimpse ---------------------- * Rank: 22 * date and approx. time of event: 2007 Nov 01, 00:39 - 2007 Nov 01, 00:52 UT * magnitude of target star: 10.9 * magnitude drop [mag]: 6.0 * estimated maximum duration [s]: 6.3 * Moon: 59 % sunlit, 158° distance * Sun: 91° distance * rough path description: Argentina, Chile The occultation path -------------------- * approximate projected width [km]: 101 * 1 sigma uncertainty interval [path widths]: +/- 3.07 * 1 sigma uncertainty interval [seconds]: +/- 25.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .111 +/- .069) * 1 sigma uncertainty ellipse (major, minor, PA): ( .111", .069", 87° ) * approx speed of asteroid's shadow [km/s]: 15.6683 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of 2UCAC 30608824 by 3709 Polypoites on 2007 Nov 01 Centre Star Star Sun Path Limits Error Limits E. Longitude Latitude U.T. Alt Az Alt Limit 1 Limit 2 Limit 3 Limit 4 o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " Latitude Latitude Latitude Latitude 169 0 0 12 41 42 0 39 20 0 94 63 12 14 6 13 9 14 9 23 29 .. .. .. 170 0 0 12 37 38 0 39 20 1 94 63 12 10 2 13 5 11 9 19 18 .. .. .. 171 0 0 12 33 7 0 39 20 2 94 63 12 5 30 13 0 41 9 14 40 .. .. .. 172 0 0 12 28 9 0 39 20 3 94 63 12 0 31 12 55 45 9 9 33 .. .. .. 173 0 0 12 22 44 0 39 21 4 95 63 11 55 4 12 50 21 9 3 59 .. .. .. 174 0 0 12 16 51 0 39 21 5 95 62 11 49 10 12 44 29 8 57 56 .. .. .. 175 0 0 12 10 31 0 39 22 6 95 62 11 42 49 12 38 11 8 51 26 .. .. .. 176 0 0 12 3 44 0 39 23 7 95 62 11 36 0 12 31 25 8 44 27 15 20 24 177 0 0 11 56 30 0 39 24 8 95 62 11 28 44 12 24 12 8 37 0 15 13 20 178 0 0 11 48 48 0 39 25 9 96 61 11 21 0 12 16 32 8 29 6 15 5 51 179 0 0 11 40 38 0 39 26 10 96 61 11 12 49 12 8 25 8 20 43 14 57 54 180 0 0 11 32 2 0 39 27 11 96 61 11 4 10 11 59 50 8 11 53 14 49 31 -179 0 0 11 22 58 0 39 29 12 96 60 10 55 4 11 50 48 8 2 34 14 40 41 -178 0 0 11 13 26 0 39 30 13 96 60 10 45 31 11 41 18 7 52 47 14 31 24 -177 0 0 11 3 27 0 39 32 14 97 60 10 35 30 11 31 22 7 42 32 14 21 40 -176 0 0 10 53 1 0 39 34 15 97 59 10 25 1 11 20 58 7 31 49 14 11 30 -175 0 0 10 42 7 0 39 36 16 97 59 10 14 5 11 10 6 7 20 38 14 0 52 -174 0 0 10 30 46 0 39 38 17 97 58 10 2 42 10 58 48 7 8 59 13 49 48 -173 0 0 10 18 58 0 39 40 18 97 58 9 50 51 10 47 2 6 56 53 13 38 18 -172 0 0 10 6 42 0 39 43 19 97 57 9 38 33 10 34 49 6 44 18 13 26 20 -171 0 0 9 54 0 0 39 45 20 97 57 9 25 47 10 22 9 6 31 16 13 13 56 -170 0 0 9 40 49 0 39 48 21 98 56 9 12 34 10 9 1 6 17 45 13 1 5 -169 0 0 9 27 12 0 39 50 22 98 56 8 58 54 9 55 27 6 3 47 12 47 48 -168 0 0 9 13 8 0 39 53 23 98 55 8 44 47 9 41 25 5 49 22 12 34 4 -167 0 0 8 58 36 0 39 56 24 98 55 8 30 12 9 26 57 5 34 29 12 19 53 -166 0 0 8 43 38 0 39 59 25 98 54 8 15 11 9 12 2 5 19 8 12 5 16 -165 0 0 8 28 13 0 40 3 26 98 53 7 59 43 8 56 39 5 3 20 11 50 12 -164 0 0 8 12 21 0 40 6 27 98 53 7 43 47 8 40 50 4 47 5 11 34 42 -163 0 0 7 56 2 0 40 10 28 98 52 7 27 25 8 24 35 4 30 23 11 18 46 -162 0 0 7 39 17 0 40 13 29 98 51 7 10 37 8 7 53 4 13 13 11 2 24 -161 0 0 7 22 5 0 40 17 30 98 51 6 53 22 7 50 45 3 55 37 10 45 35 -160 0 0 7 4 27 0 40 21 31 99 50 6 35 41 7 33 10 3 37 35 10 28 21 -159 0 0 6 46 23 0 40 25 32 99 49 6 17 33 7 15 10 3 19 6 10 10 41 -158 0 0 6 27 53 0 40 29 34 99 49 5 59 0 6 56 43 3 0 11 9 52 35 -157 0 0 6 8 58 0 40 34 35 99 48 5 40 1 6 37 51 2 40 50 9 34 4 -156 0 0 5 49 37 0 40 38 36 99 47 5 20 36 6 18 33 2 21 3 9 15 8 -155 0 0 5 29 50 0 40 43 37 99 46 5 0 46 5 58 51 2 0 50 8 55 46 -154 0 0 5 9 39 0 40 47 38 98 46 4 40 31 5 38 43 1 40 13 8 36 0 -153 0 0 4 49 2 0 40 52 39 98 45 4 19 51 5 18 10 1 19 10 8 15 49 -152 0 0 4 28 2 0 40 57 40 98 44 3 58 47 4 57 13 0 57 43 7 55 13 -151 0 0 4 6 37 0 41 2 41 98 43 3 37 18 4 35 51 0 35 52 7 34 14 -150 0 0 3 44 48 0 41 7 42 98 42 3 15 26 4 14 6 0 13 36 7 12 50 -149 0 0 3 22 35 0 41 13 43 98 42 2 53 10 3 51 57 - 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Data for the target star ------------------------ * name: 2UCAC 30608824 * constellation : Aquila * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 20 30 27.7920 DE: -03 33 10.507 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .033, .027 ) * V mag [mag]: 10.9 * B mag [mag]: 0.0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (3709) Polypoites approx. diameter [km]: 99 approx. diameter ["]: .026 distance from Earth [AU]: 5.26700 * orbital information: orbit source: Preston date of fit: 2007 Oct 23 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 414 number of rejected observations: 14 time covered by the observations: 1979 Apr 24 - 2007 Sep 20 1 sigma uncertainty ellipse (major, minor, PA): 0.106, 0.063, 87° remarks: * orbital elements for (3709) Polypoites : Mean anomaly = 252.44477481 deg Arg. of pericenter = 245.36985616 deg Long. of node = 187.16895235 deg Inclination = 19.60459974 deg Eccentricity = 0.06195693 Semimajor axis = 5.26046833 AU Perihelion dist = 4.93454587 AU Mag: H = 9.12, G = 0.15 Epoch of elements : MJD 54405.03200000 TDT (2007 Nov 01.032) ------ occelmnt file for Occult BEGIN ----------------------------------- 2007 Nov 01 3709 Polypoites 0h 45.9m UT 10.9 20 30 27.792- 3 33 10.512UCAC 30608824 0.0 16.9 99 6.3 5.267 0.893 -6.28 256.194 -3.551 164.42 -14.25 0.7657 -.09307 -.19597 8.00316 -3.76289 0.00588 0.00149 2000 252.03371220071027.00000245.369856187.168952 19.6046000.061956935.260468334.93454587 9.05 0.15 RATE .8168970 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 Meas 0.111 0.069 87.3 4.070 0.080 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2007 Oct 23, 21:56 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org