IOTA/IOTA-ES occultation update for (156) Xanthippe / TYC 1241-00923-1 event on 2024 Dec 08, 11:58 UT Visible from Summary ------- On 2024 Dec 08 UT, the 124.216944847904 km diameter asteroid (156) Xanthippe will occult a 11.1 mag star in the constellation Taurus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 2.70 mag to 13.72 mag (the magnitude of the asteroid) for at most 8.970 seconds. This update is based on, astrometry for the asteroid kindly provided by the IAU Minor Planet Center. This work has made use of data from the European Space Agency (ESA) mission Gaia (http://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC, http://www.cosmos.esa.int/web/gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. The event at a glimpse ---------------------- * Rank: 100 * date and approx. time of event: 2024 Dec 08, 11:51 - 2024 Dec 08, 12:04 * geocentric midpoint of event [JD]: 2460652.99884333 * magnitude of target star: 11.11 * magnitude drop [mag]: 2.70 * estimated maximum duration [s]: 8.970 * Moon: 49 % sunlit, 68° distance * Sun: 157° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 151 * 1 sigma uncertainty interval [path widths]: +/- 0.05 * 1 sigma uncertainty interval [seconds]: +/- 1.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.010, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.010", 0.002", 82°) * approx speed of asteroid's shadow [km/s]: 13.8681 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1241-00923-1 by 156 Xanthippe on 2024 Dec 8 Centre Star Star Sun Path Limits Error Limits Alt E. Longitude Latitude U.T. Alt Az Alt Limit 1 Limit 2 Limit 3 Limit 4 Crn o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " Latitude Latitude Latitude Latitude 91 0 0 .. .. .... .. .. .. .. .. .. -54 4 33 .. .. .. -53 59 56 .. .. .. .... 92 0 0 -54 30 8 12 4 37.9 0 55 15 -53 40 39 .. .. .. -53 36 0 .. .. .. .... 93 0 0 -54 5 54 12 4 37.9 1 55 15 -53 16 13 -54 56 12 -53 11 34 -55 0 58 0.24 94 0 0 -53 41 9 12 4 37.7 2 54 14 -52 51 17 -54 31 38 -52 46 37 -54 36 26 0.44 95 0 0 -53 15 53 12 4 37.5 2 53 13 -52 25 50 -54 6 34 -52 21 9 -54 11 22 0.52 96 0 0 -52 50 6 12 4 37.1 3 52 13 -51 59 52 -53 40 57 -51 55 10 -53 45 47 0.56 97 0 0 -52 23 47 12 4 36.7 4 51 12 -51 33 23 -53 14 50 -51 28 40 -53 19 40 0.59 98 0 0 -51 56 58 12 4 36.2 5 51 11 -51 6 24 -52 48 10 -51 1 39 -52 53 2 0.60 99 0 0 -51 29 37 12 4 35.5 5 50 10 -50 38 53 -52 21 0 -50 34 8 -52 25 52 0.62 100 0 0 -51 1 45 12 4 34.8 6 49 10 -50 10 52 -51 53 18 -50 6 7 -51 58 11 0.63 101 0 0 -50 33 23 12 4 33.9 7 48 9 -49 42 21 -51 25 5 -49 37 35 -51 29 59 0.64 102 0 0 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41 - 5 4 33 - 3 37 49 - 5 8 29 0.71 -136 0 0 - 4 31 25 11 52 31.2 19 292 -39 - 3 50 6 - 5 13 6 - 3 46 13 - 5 17 3 0.71 -135 0 0 - 4 40 33 11 52 28.1 18 292 -38 - 3 59 9 - 5 22 18 - 3 55 16 - 5 26 15 0.71 -134 0 0 - 4 50 19 11 52 25.2 17 292 -37 - 4 8 51 - 5 32 9 - 4 4 57 - 5 36 7 0.71 -133 0 0 - 5 0 45 11 52 22.5 16 291 -36 - 4 19 11 - 5 42 40 - 4 15 17 - 5 46 38 0.71 -132 0 0 - 5 11 49 11 52 19.9 15 291 -35 - 4 30 10 - 5 53 50 - 4 26 16 - 5 57 48 0.71 -131 0 0 - 5 23 33 11 52 17.5 14 291 -34 - 4 41 48 - 6 5 39 - 4 37 53 - 6 9 38 0.71 -130 0 0 - 5 35 55 11 52 15.2 13 291 -33 - 4 54 5 - 6 18 7 - 4 50 9 - 6 22 7 0.72 -129 0 0 - 5 48 57 11 52 13.1 12 291 -33 - 5 7 0 - 6 31 16 - 5 3 4 - 6 35 16 0.72 -128 0 0 - 6 2 38 11 52 11.1 11 291 -32 - 5 20 35 - 6 45 3 - 5 16 38 - 6 49 4 0.72 -127 0 0 - 6 16 58 11 52 9.3 10 291 -31 - 5 34 48 - 6 59 30 - 5 30 51 - 7 3 32 0.72 -126 0 0 - 6 31 58 11 52 7.7 9 291 -30 - 5 49 41 - 7 14 37 - 5 45 43 - 7 18 40 0.73 -125 0 0 - 6 47 36 11 52 6.3 8 290 -29 - 6 5 12 - 7 30 24 - 6 1 14 - 7 34 27 0.73 -124 0 0 - 7 3 55 11 52 5.0 7 290 -28 - 6 21 23 - 7 46 50 - 6 17 23 - 7 50 54 0.73 -123 0 0 - 7 20 52 11 52 3.9 6 290 -27 - 6 38 13 - 8 3 55 - 6 34 12 - 8 8 0 0.74 -122 0 0 - 7 38 29 11 52 3.0 5 290 -26 - 6 55 41 - 8 21 41 - 6 51 40 - 8 25 46 0.75 -121 0 0 - 7 56 46 11 52 2.2 4 290 -25 - 7 13 49 - 8 40 6 - 7 9 48 - 8 44 12 0.76 -120 0 0 - 8 15 42 11 52 1.7 3 290 -24 - 7 32 36 - 8 59 11 - 7 28 34 - 9 3 18 0.79 -119 0 0 - 8 35 17 11 52 1.3 2 290 -23 - 7 52 2 - 9 18 55 - 7 47 59 - 9 23 3 0.84 -118 0 0 - 8 55 31 11 52 1.1 1 289 -22 - 8 12 7 - 9 39 19 - 8 8 3 - 9 43 28 1.07 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 1241-00923-1 * constellation : Taurus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 03 24 39.9773 DE: +19 01 15.978 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 03 24 39.9772 DE: +19 01 15.978 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.1 * B mag [mag]: 11.7 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (156) Xanthippe asteroid class: approx. diameter [km]: 124 approx. diameter ["]: 0.073 distance from Earth [AU]: 2.35850 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#184 date of fit: 2023 Apr 27 source of used astrometry: MPC, JPL number of used observations: 0 number of rejected observations: 0 time covered by the observations: 1800 Jan 01 - 1800 Jan 01 1 sigma uncertainty ellipse (major, minor, PA): 0.010", 0.002", 81.9° remarks: * orbital elements for (156)Xanthippe : Mean anomaly = 210.2785540550 deg Arg. of pericenter = 338.5916586951 deg Long. of node = 241.7802364420 deg Inclination = 9.7810704197 deg Eccentricity = 0.2233802884 Semimajor axis = 2.7342003579 AU Perihelion dist = 2.1234338934 AU Mag: H = 8.77, G = 0.15 Epoch of elements : MJD 60652.49884071 TDT (2024 Dec 08.4988) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1842023Apr27,8.97,2024,12,8,11.972240,0.238191,-0.513661,-7.101321,-3.292666,0.002319,0.000558,0.000001,0.000000 154.2091,19.1109,-1.56,-22.79,False TYC 1241-00923-1,3.41110480,19.0211050,11.72,11.11,10.78,0.1,0,,3.43520396,19.1109360,2.71,2.60,0,0,0 156,Xanthippe,13.72,124.388,2.3585,0,0,-1.868,-12.27,,7.0,0 0,210.1698,2024,12,8,338.5917,241.7802,9.7811,0.22338,2.73420,2.12343,8.77,5.0,0.15 1.047,0.0100,0.0019,82,0.0034,Known errors,1.10,0,-1,-1 20241208_0923-1,60140.73 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 17:34 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org