IOTA/IOTA-ES occultation update for (1940) Whipple / HIP 61651 event on 2024 Mar 10, 18:55 UT Visible from Summary ------- On 2024 Mar 10 UT, the 34.8161755377241 km diameter asteroid (1940) Whipple will occult a 8.0 mag star in the constellation Corvus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 7.87 mag to 15.90 mag (the magnitude of the asteroid) for at most 3.280 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: 99 * date and approx. time of event: 2024 Mar 10, 18:48 - 2024 Mar 10, 19:03 * geocentric midpoint of event [JD]: 2460380.28886729 * magnitude of target star: 8.03 * magnitude drop [mag]: 7.87 * estimated maximum duration [s]: 3.280 * Moon: 0 % sunlit, 158° distance * Sun: 154° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 45 * 1 sigma uncertainty interval [path widths]: +/- 0.11 * 1 sigma uncertainty interval [seconds]: +/- 3.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.021, +/- 0.008) * 1 sigma uncertainty ellipse (major, minor, PA): (0.023", 0.002", 111°) * approx speed of asteroid's shadow [km/s]: 10.6582 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of HIP 61651 by 1940 Whipple on 2024 Mar 10 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 - 0 0 0 -22 3 32 19 3 38.7 1 105 -11 -21 50 51 -22 16 15 -21 48 3 -22 19 4 .... 1 0 0 -22 19 24 19 3 38.4 2 105 -12 -22 6 41 -22 32 8 -22 3 53 -22 34 58 0.65 2 0 0 -22 35 39 19 3 37.9 3 104 -13 -22 22 55 -22 48 25 -22 20 7 -22 51 15 0.71 3 0 0 -22 52 18 19 3 37.2 4 104 -14 -22 39 33 -23 5 6 -22 36 44 -23 7 56 0.74 4 0 0 -23 9 20 19 3 36.3 5 103 -14 -22 56 33 -23 22 9 -22 53 44 -23 24 59 0.76 5 0 0 -23 26 44 19 3 35.1 6 103 -15 -23 13 56 -23 39 35 -23 11 6 -23 42 26 0.77 6 0 0 -23 44 31 19 3 33.8 6 103 -16 -23 31 41 -23 57 23 -23 28 51 -24 0 14 0.77 7 0 0 -24 2 39 19 3 32.2 7 102 -17 -23 49 48 -24 15 33 -23 46 57 -24 18 24 0.78 8 0 0 -24 21 9 19 3 30.4 8 102 -18 -24 8 16 -24 34 4 -24 5 25 -24 36 56 0.78 9 0 0 -24 39 59 19 3 28.4 9 101 -19 -24 27 4 -24 52 56 -24 24 14 -24 55 48 0.79 10 0 0 -24 59 10 19 3 26.2 10 101 -19 -24 46 14 -25 12 9 -24 43 22 -25 15 1 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15 -57 44 21 -58 10 17 -57 41 29 -58 13 9 0.86 -165 0 0 -57 45 43 18 48 27.4 9 257 16 -57 32 45 -57 58 45 -57 29 53 -58 1 38 0.86 -164 0 0 -57 33 52 18 48 26.2 8 256 17 -57 20 51 -57 46 55 -57 17 59 -57 49 48 0.86 -163 0 0 -57 21 42 18 48 25.2 8 256 17 -57 8 39 -57 34 46 -57 5 47 -57 37 40 0.87 -162 0 0 -57 9 13 18 48 24.2 7 255 18 -56 56 9 -57 22 20 -56 53 16 -57 25 14 0.87 -161 0 0 -56 56 27 18 48 23.2 6 254 18 -56 43 21 -57 9 35 -56 40 27 -57 12 30 0.88 -160 0 0 -56 43 21 18 48 22.4 6 253 19 -56 30 14 -56 56 32 -56 27 20 -56 59 27 0.88 -159 0 0 -56 29 58 18 48 21.6 5 252 20 -56 16 48 -56 43 10 -56 13 54 -56 46 5 0.89 -158 0 0 -56 16 15 18 48 20.9 5 251 20 -56 3 4 -56 29 29 -56 0 10 -56 32 25 0.90 -157 0 0 -56 2 14 18 48 20.3 4 251 21 -55 49 1 -56 15 30 -55 46 6 -56 18 26 0.92 -156 0 0 -55 47 54 18 48 19.7 3 250 21 -55 34 39 -56 1 12 -55 31 44 -56 4 9 0.93 -155 0 0 -55 33 15 18 48 19.2 3 249 22 -55 19 59 -55 46 35 -55 17 3 -55 49 32 0.96 -154 0 0 -55 18 17 18 48 18.9 2 248 23 -55 4 59 -55 31 39 -55 2 3 -55 34 36 1.01 -153 0 0 -55 3 0 18 48 18.6 2 247 23 -54 49 40 -55 16 24 -54 46 43 -55 19 22 1.08 -152 0 0 -54 47 24 18 48 18.4 1 246 24 -54 34 2 -55 0 49 -54 31 5 -55 3 48 1.27 -151 0 0 -54 31 29 18 48 18.3 0 246 24 -54 18 5 -54 44 56 -54 15 8 -54 47 55 2.33 Uncertainty in time = +/- 3 secs Prediction of 2023 Jul 14.2 Data for the target star ------------------------ * name: HIP 61651 * constellation : Corvus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 12 38 17.5677 DE: -14 03 34.637 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 12 38 17.5678 DE: -14 03 34.638 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 8.0 * B mag [mag]: 8.3 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1940) Whipple asteroid class: approx. diameter [km]: 35 approx. diameter ["]: 0.022 distance from Earth [AU]: 2.14850 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#57 date of fit: 2023 Apr 24 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): 0.023", 0.002", 110.8° remarks: * orbital elements for (1940)Whipple : Mean anomaly = 90.5381734625 deg Arg. of pericenter = 185.5943547994 deg Long. of node = 263.5700866970 deg Inclination = 6.5390245423 deg Eccentricity = 0.0610191746 Semimajor axis = 3.0615170703 AU Perihelion dist = 2.8747058257 AU Mag: H = 11.24, G = 0.15 Epoch of elements : MJD 60379.78886696 TDT (2024 Mar 10.7889) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#572023Apr24,3.28,2024,3,10,18.932815,-0.188131,-0.608614,-5.748700,1.772657,-0.001870,0.001748,0.000001,-0.000001 96.9612,-14.1940,-101.48,-3.69,False HIP 61651,12.63821324,-14.0596212,8.25,8.03,7.91,0.1,0,,12.65947762,-14.1940355,7.87,7.54,0,0,0 1940,Whipple,15.90,34.972,2.1485,0,0,-1.618,7.26,,2.0,0 0,90.3930,2024,3,10,185.5944,263.5701,6.5390,0.06102,3.06152,2.87471,11.24,5.0,0.15 1.111,0.0227,0.0020,111,0.0025,Known errors,0.89,0,-1,-1 20240310__61651,60139.22 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 14, 05:23 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org