IOTA/IOTA-ES occultation update for (704) Interamnia / UCAC4 561-018759 event on 2024 Mar 24, 19:02 UT Visible from Summary ------- On 2024 Mar 24 UT, the 329.357 km diameter asteroid (704) Interamnia will occult a 10.9 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 1.45 mag to 12.01 mag (the magnitude of the asteroid) for at most 15.470 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 Mar 24, 18:57 - 2024 Mar 24, 19:06 * geocentric midpoint of event [JD]: 2460394.29309620 * magnitude of target star: 10.89 * magnitude drop [mag]: 1.45 * estimated maximum duration [s]: 15.470 * Moon: 100 % sunlit, 95° distance * Sun: 81° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 396 * 1 sigma uncertainty interval [path widths]: +/- 0.02 * 1 sigma uncertainty interval [seconds]: +/- 1.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.017, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.018", 0.002", 106°) * approx speed of asteroid's shadow [km/s]: 21.2933 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 561-018759 by 704 Interamnia on 2024 Mar 24 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 -103 0 0 -21 29 39 18 57 54.4 0 66 67 .. .. .. -19 34 9 .. .. .. -19 29 48 .... -102 0 0 -21 4 59 18 57 54.5 1 66 67 -23 3 3 -19 9 45 -23 7 37 -19 5 25 0.24 -101 0 0 -20 40 37 18 57 54.7 2 65 67 -22 38 24 -18 45 39 -22 42 58 -18 41 19 0.43 -100 0 0 -20 16 34 18 57 55.0 3 65 68 -22 14 4 -18 21 52 -22 18 37 -18 17 32 0.50 - 99 0 0 -19 52 50 18 57 55.4 4 65 68 -21 50 3 -17 58 23 -21 54 35 -17 54 4 0.54 - 98 0 0 -19 29 25 18 57 55.9 5 64 68 -21 26 22 -17 35 14 -21 30 53 -17 30 56 0.56 - 97 0 0 -19 6 21 18 57 56.5 6 64 68 -21 3 1 -17 12 26 -21 7 31 -17 8 8 0.58 - 96 0 0 -18 43 38 18 57 57.3 7 64 68 -20 40 0 -16 49 58 -20 44 30 -16 45 41 0.59 - 95 0 0 -18 21 16 18 57 58.2 8 63 68 -20 17 22 -16 27 51 -20 21 51 -16 23 35 0.60 - 94 0 0 -17 59 15 18 57 59.2 9 63 68 -19 55 5 -16 6 7 -19 59 33 -16 1 51 0.61 - 93 0 0 -17 37 38 18 58 0.3 10 63 68 -19 33 10 -15 44 45 -19 37 38 -15 40 29 0.61 - 92 0 0 -17 16 23 18 58 1.5 11 62 68 -19 11 39 -15 23 45 -19 16 6 -15 19 30 0.62 - 91 0 0 -16 55 32 18 58 2.8 12 62 68 -18 50 32 -15 3 9 -18 54 58 -14 58 55 0.62 - 90 0 0 -16 35 4 18 58 4.2 13 62 68 -18 29 48 -14 42 57 -18 34 14 -14 38 43 0.62 - 89 0 0 -16 15 1 18 58 5.7 14 61 67 -18 9 29 -14 23 8 -18 13 54 -14 18 55 0.63 - 88 0 0 -15 55 23 18 58 7.4 15 61 67 -17 49 35 -14 3 45 -17 53 59 -13 59 32 0.63 - 87 0 0 -15 36 9 18 58 9.1 16 61 66 -17 30 6 -13 44 46 -17 34 30 -13 40 34 0.63 - 86 0 0 -15 17 22 18 58 11.0 17 60 66 -17 11 3 -13 26 13 -17 15 26 -13 22 2 0.63 - 85 0 0 -14 59 0 18 58 13.0 18 60 66 -16 52 26 -13 8 6 -16 56 49 -13 3 55 0.64 - 84 0 0 -14 41 5 18 58 15.1 19 60 65 -16 34 16 -12 50 25 -16 38 38 -12 46 14 0.64 - 83 0 0 -14 23 37 18 58 17.2 20 59 64 -16 16 33 -12 33 10 -16 20 55 -12 29 0 0.64 - 82 0 0 -14 6 35 18 58 19.5 21 59 64 -15 59 17 -12 16 22 -16 3 38 -12 12 12 0.64 - 81 0 0 -13 50 1 18 58 21.9 22 59 63 -15 42 29 -12 0 1 -15 46 50 -11 55 52 0.64 - 80 0 0 -13 33 55 18 58 24.4 23 58 62 -15 26 9 -11 44 8 -15 30 29 -11 39 59 0.64 - 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Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 14.3 Data for the target star ------------------------ * name: UCAC4 561-018759 * constellation : Taurus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 05 37 57.1518 DE: +22 05 47.191 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 05 37 57.1518 DE: +22 05 47.191 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 10.9 * B mag [mag]: 11.0 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (704) Interamnia asteroid class: approx. diameter [km]: 329 approx. diameter ["]: 0.152 distance from Earth [AU]: 2.97790 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#161 date of fit: 2023 Feb 07 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): 0.018", 0.002", 106.3° remarks: * orbital elements for (704)Interamnia : Mean anomaly = 72.1846609275 deg Arg. of pericenter = 94.2381388183 deg Long. of node = 280.1670938231 deg Inclination = 17.3144612070 deg Eccentricity = 0.1556568103 Semimajor axis = 3.0564556311 AU Perihelion dist = 2.5806974967 AU Mag: H = 6.29, G = -0.02 Epoch of elements : MJD 60393.79309567 TDT (2024 Mar 24.7931) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1612023Feb07,15.47,2024,3,24,19.034309,-0.100617,-0.545019,11.819662,-2.177340,0.005721,0.000183,0.000000,0.000000 -23.4059,22.1114,-104.01,1.84,False UCAC4 561-018759,5.63254220,22.0964421,11.04,10.89,10.81,0.0,0,,5.65671020,22.1113748,1.45,1.19,0,0,0 704,Interamnia,12.01,329.357,2.9779,0,0,2.512,-6.43,,16.6,0 0,72.0384,2024,3,24,94.2381,280.1671,17.3145,0.15566,3.05646,2.58070,6.29,5.0,0.15 1.019,0.0177,0.0023,106,0.0029,Known errors,1.04,0,-1,-1 20240324_018759,60139.25 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 14, 06:05 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org