IOTA/IOTA-ES occultation update for (3705) Hotellasilla / UCAC4 346-083598 event on 2024 Mar 05, 06:03 UT Visible from Summary ------- On 2024 Mar 05 UT, the 17.872 km diameter asteroid (3705) Hotellasilla will occult a 11.8 mag star in the constellation Ophiuchus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 7.14 mag to 18.93 mag (the magnitude of the asteroid) for at most 1.340 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 05, 05:55 - 2024 Mar 05, 06:11 * geocentric midpoint of event [JD]: 2460374.75268521 * magnitude of target star: 11.79 * magnitude drop [mag]: 7.14 * estimated maximum duration [s]: 1.340 * Moon: 33 % sunlit, 24° distance * Sun: 93° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 18 * 1 sigma uncertainty interval [path widths]: +/- 0.19 * 1 sigma uncertainty interval [seconds]: +/- 2.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.015, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.015", 0.001", 98°) * approx speed of asteroid's shadow [km/s]: 13.3682 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 346-083598 by 3705 Hotellasilla on 2024 Mar 5 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 - 87 0 0 9 50 29 5 55 58.3 0 111 -86 9 45 15 9 55 42 9 43 18 9 57 39 .... - 86 0 0 9 27 20 5 55 58.4 1 111 -86 9 22 6 9 32 34 9 20 9 9 34 31 0.04 - 85 0 0 9 4 5 5 55 58.7 2 112 -87 8 58 51 9 9 19 8 56 54 9 11 16 -0.02 - 84 0 0 8 40 45 5 55 59.2 3 112 -86 8 35 31 8 45 59 8 33 34 8 47 56 -0.05 - 83 0 0 8 17 20 5 55 59.8 5 112 -86 8 12 6 8 22 34 8 10 9 8 24 31 -0.06 - 82 0 0 7 53 51 5 56 0.6 6 112 -85 7 48 37 7 59 5 7 46 40 8 1 2 -0.07 - 81 0 0 7 30 18 5 56 1.5 7 112 -85 7 25 4 7 35 32 7 23 7 7 37 30 -0.07 - 80 0 0 7 6 42 5 56 2.7 8 112 -84 7 1 28 7 11 57 6 59 31 7 13 54 -0.07 - 79 0 0 6 43 4 5 56 4.0 9 112 -83 6 37 50 6 48 18 6 35 53 6 50 15 -0.08 - 78 0 0 6 19 24 5 56 5.4 10 113 -82 6 14 9 6 24 38 6 12 12 6 26 35 -0.08 - 77 0 0 5 55 42 5 56 7.0 11 113 -81 5 50 28 6 0 56 5 48 30 6 2 53 -0.08 - 76 0 0 5 31 59 5 56 8.8 12 113 -80 5 26 45 5 37 13 5 24 48 5 39 11 -0.08 - 75 0 0 5 8 16 5 56 10.8 13 113 -79 5 3 2 5 13 31 5 1 5 5 15 28 -0.08 - 74 0 0 4 44 34 5 56 12.9 14 113 -78 4 39 20 4 49 48 4 37 22 4 51 45 -0.09 - 73 0 0 4 20 52 5 56 15.2 15 113 -77 4 15 38 4 26 6 4 13 41 4 28 3 -0.09 - 72 0 0 3 57 12 5 56 17.7 16 113 -76 3 51 58 4 2 26 3 50 1 4 4 23 -0.09 - 71 0 0 3 33 34 5 56 20.4 17 113 -75 3 28 20 3 38 48 3 26 23 3 40 45 -0.09 - 70 0 0 3 9 58 5 56 23.2 19 113 -74 3 4 44 3 15 12 3 2 47 3 17 9 -0.09 - 69 0 0 2 46 26 5 56 26.1 20 113 -73 2 41 12 2 51 40 2 39 15 2 53 37 -0.09 - 68 0 0 2 22 58 5 56 29.2 21 113 -71 2 17 44 2 28 11 2 15 47 2 30 8 -0.09 - 67 0 0 1 59 34 5 56 32.5 22 113 -70 1 54 20 2 4 47 1 52 24 2 6 44 -0.09 - 66 0 0 1 36 15 5 56 36.0 23 113 -69 1 31 2 1 41 28 1 29 5 1 43 25 -0.09 - 65 0 0 1 13 2 5 56 39.6 24 114 -68 1 7 49 1 18 15 1 5 52 1 20 12 -0.09 - 64 0 0 0 49 55 5 56 43.4 25 114 -67 0 44 42 0 55 8 0 42 45 0 57 4 -0.09 - 63 0 0 0 26 54 5 56 47.3 26 114 -66 0 21 41 0 32 7 0 19 45 0 34 4 -0.09 - 62 0 0 0 4 1 5 56 51.4 27 114 -65 - 0 1 11 0 9 14 - 0 3 8 0 11 10 -0.09 - 61 0 0 - 0 18 44 5 56 55.6 28 114 -64 - 0 23 56 - 0 13 32 - 0 25 53 - 0 11 35 -0.09 - 60 0 0 - 0 41 21 5 57 0.0 29 114 -63 - 0 46 33 - 0 36 9 - 0 48 29 - 0 34 12 -0.09 - 59 0 0 - 1 3 49 5 57 4.5 30 114 -62 - 1 9 0 - 0 58 37 - 1 10 57 - 0 56 40 -0.10 - 58 0 0 - 1 26 7 5 57 9.2 32 114 -61 - 1 31 18 - 1 20 55 - 1 33 14 - 1 18 59 -0.10 - 57 0 0 - 1 48 15 5 57 14.0 33 114 -60 - 1 53 26 - 1 43 4 - 1 55 22 - 1 41 8 -0.10 - 56 0 0 - 2 10 13 5 57 19.0 34 114 -59 - 2 15 24 - 2 5 2 - 2 17 19 - 2 3 6 -0.10 - 55 0 0 - 2 31 59 5 57 24.1 35 114 -57 - 2 37 10 - 2 26 48 - 2 39 6 - 2 24 53 -0.10 - 54 0 0 - 2 53 34 5 57 29.3 36 114 -56 - 2 58 44 - 2 48 24 - 3 0 40 - 2 46 28 -0.10 - 53 0 0 - 3 14 57 5 57 34.7 37 114 -55 - 3 20 7 - 3 9 47 - 3 22 2 - 3 7 51 -0.10 - 52 0 0 - 3 36 7 5 57 40.2 38 114 -54 - 3 41 17 - 3 30 57 - 3 43 12 - 3 29 2 -0.10 - 51 0 0 - 3 57 4 5 57 45.8 39 114 -53 - 4 2 13 - 3 51 55 - 4 4 9 - 3 49 59 -0.10 - 50 0 0 - 4 17 48 5 57 51.6 40 114 -52 - 4 22 57 - 4 12 39 - 4 24 52 - 4 10 43 -0.10 - 49 0 0 - 4 38 17 5 57 57.4 41 114 -51 - 4 43 26 - 4 33 8 - 4 45 21 - 4 31 13 -0.10 - 48 0 0 - 4 58 32 5 58 3.4 42 114 -50 - 5 3 41 - 4 53 24 - 5 5 35 - 4 51 29 -0.10 - 47 0 0 - 5 18 32 5 58 9.6 43 114 -49 - 5 23 40 - 5 13 24 - 5 25 35 - 5 11 30 -0.10 - 46 0 0 - 5 38 17 5 58 15.8 44 114 -48 - 5 43 25 - 5 33 10 - 5 45 20 - 5 31 15 -0.10 - 45 0 0 - 5 57 46 5 58 22.1 45 114 -47 - 6 2 54 - 5 52 39 - 6 4 48 - 5 50 45 -0.10 - 44 0 0 - 6 16 59 5 58 28.6 47 114 -46 - 6 22 6 - 6 11 53 - 6 24 1 - 6 9 58 -0.10 - 43 0 0 - 6 35 56 5 58 35.1 48 114 -45 - 6 41 2 - 6 30 49 - 6 42 57 - 6 28 55 -0.10 - 42 0 0 - 6 54 36 5 58 41.8 49 114 -44 - 6 59 42 - 6 49 29 - 7 1 36 - 6 47 35 -0.10 - 41 0 0 - 7 12 58 5 58 48.5 50 114 -42 - 7 18 4 - 7 7 52 - 7 19 57 - 7 5 58 -0.10 - 40 0 0 - 7 31 3 5 58 55.4 51 114 -41 - 7 36 8 - 7 25 57 - 7 38 2 - 7 24 3 -0.10 - 39 0 0 - 7 48 49 5 59 2.3 52 114 -40 - 7 53 54 - 7 43 44 - 7 55 48 - 7 41 51 -0.10 - 38 0 0 - 8 6 18 5 59 9.4 53 114 -39 - 8 11 22 - 8 1 13 - 8 13 16 - 7 59 20 -0.10 - 37 0 0 - 8 23 28 5 59 16.5 54 114 -38 - 8 28 32 - 8 18 24 - 8 30 25 - 8 16 30 -0.10 - 36 0 0 - 8 40 19 5 59 23.7 55 114 -37 - 8 45 22 - 8 35 15 - 8 47 15 - 8 33 22 -0.10 - 35 0 0 - 8 56 50 5 59 31.0 56 114 -36 - 9 1 54 - 8 51 47 - 9 3 47 - 8 49 54 -0.10 - 34 0 0 - 9 13 3 5 59 38.3 57 114 -35 - 9 18 5 - 9 8 0 - 9 19 58 - 9 6 7 -0.10 - 33 0 0 - 9 28 55 5 59 45.8 58 115 -34 - 9 33 58 - 9 23 53 - 9 35 50 - 9 22 0 -0.10 - 32 0 0 - 9 44 28 5 59 53.3 59 115 -33 - 9 49 30 - 9 39 25 - 9 51 22 - 9 37 33 -0.11 - 31 0 0 - 9 59 40 6 0 0.8 60 115 -32 -10 4 41 - 9 54 38 -10 6 34 - 9 52 46 -0.11 - 30 0 0 -10 14 32 6 0 8.5 61 115 -31 -10 19 33 -10 9 30 -10 21 25 -10 7 38 -0.11 - 29 0 0 -10 29 3 6 0 16.2 62 115 -30 -10 34 3 -10 24 2 -10 35 56 -10 22 9 -0.11 - 28 0 0 -10 43 13 6 0 23.9 63 116 -29 -10 48 13 -10 38 12 -10 50 5 -10 36 20 -0.11 - 27 0 0 -10 57 1 6 0 31.7 64 116 -28 -11 2 2 -10 52 1 -11 3 53 -10 50 9 -0.11 - 26 0 0 -11 10 29 6 0 39.6 65 116 -27 -11 15 29 -11 5 29 -11 17 20 -11 3 38 -0.11 - 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9 57 28 6 10 3.0 38 251 48 -10 2 30 - 9 52 27 -10 4 22 - 9 50 35 -0.10 49 0 0 - 9 42 22 6 10 8.4 37 251 49 - 9 47 24 - 9 37 20 - 9 49 16 - 9 35 27 -0.10 50 0 0 - 9 26 55 6 10 13.6 36 251 50 - 9 31 57 - 9 21 53 - 9 33 50 - 9 20 0 -0.10 51 0 0 - 9 11 9 6 10 18.7 35 251 51 - 9 16 12 - 9 6 7 - 9 18 5 - 9 4 14 -0.10 52 0 0 - 8 55 4 6 10 23.6 34 251 52 - 9 0 7 - 8 50 1 - 9 2 0 - 8 48 8 -0.10 53 0 0 - 8 38 40 6 10 28.5 33 251 53 - 8 43 44 - 8 33 37 - 8 45 37 - 8 31 44 -0.10 54 0 0 - 8 21 58 6 10 33.2 32 251 54 - 8 27 1 - 8 16 54 - 8 28 55 - 8 15 1 -0.10 55 0 0 - 8 4 57 6 10 37.8 31 250 55 - 8 10 1 - 7 59 53 - 8 11 54 - 7 57 59 -0.10 56 0 0 - 7 47 38 6 10 42.3 30 250 56 - 7 52 42 - 7 42 33 - 7 54 36 - 7 40 40 -0.10 57 0 0 - 7 30 1 6 10 46.6 29 250 57 - 7 35 6 - 7 24 56 - 7 37 0 - 7 23 3 -0.10 58 0 0 - 7 12 7 6 10 50.8 28 250 58 - 7 17 13 - 7 7 2 - 7 19 6 - 7 5 8 -0.10 59 0 0 - 6 53 56 6 10 54.9 27 250 59 - 6 59 2 - 6 48 51 - 7 0 56 - 6 46 57 -0.10 60 0 0 - 6 35 29 6 10 58.8 26 250 60 - 6 40 35 - 6 30 23 - 6 42 29 - 6 28 28 -0.10 61 0 0 - 6 16 45 6 11 2.6 25 250 61 - 6 21 51 - 6 11 38 - 6 23 45 - 6 9 44 -0.10 62 0 0 - 5 57 45 6 11 6.2 24 250 62 - 6 2 52 - 5 52 38 - 6 4 46 - 5 50 44 -0.10 63 0 0 - 5 38 29 6 11 9.7 23 250 63 - 5 43 37 - 5 33 22 - 5 45 31 - 5 31 28 -0.10 64 0 0 - 5 18 59 6 11 13.0 22 250 64 - 5 24 6 - 5 13 51 - 5 26 1 - 5 11 56 -0.10 65 0 0 - 4 59 13 6 11 16.2 21 250 65 - 5 4 21 - 4 54 5 - 5 6 16 - 4 52 10 -0.10 66 0 0 - 4 39 13 6 11 19.3 19 249 66 - 4 44 22 - 4 34 5 - 4 46 16 - 4 32 10 -0.10 67 0 0 - 4 19 0 6 11 22.1 18 249 67 - 4 24 8 - 4 13 51 - 4 26 3 - 4 11 56 -0.10 68 0 0 - 3 58 32 6 11 24.9 17 249 68 - 4 3 41 - 3 53 23 - 4 5 36 - 3 51 28 -0.10 69 0 0 - 3 37 52 6 11 27.5 16 249 69 - 3 43 1 - 3 32 43 - 3 44 56 - 3 30 47 -0.10 70 0 0 - 3 16 59 6 11 29.9 15 249 70 - 3 22 8 - 3 11 49 - 3 24 4 - 3 9 54 -0.10 71 0 0 - 2 55 54 6 11 32.1 14 249 71 - 3 1 4 - 2 50 44 - 3 2 59 - 2 48 48 -0.10 72 0 0 - 2 34 37 6 11 34.2 13 249 72 - 2 39 47 - 2 29 27 - 2 41 43 - 2 27 31 -0.09 73 0 0 - 2 13 9 6 11 36.2 12 249 73 - 2 18 19 - 2 7 58 - 2 20 15 - 2 6 3 -0.09 74 0 0 - 1 51 30 6 11 38.0 11 249 74 - 1 56 41 - 1 46 19 - 1 58 36 - 1 44 23 -0.09 75 0 0 - 1 29 41 6 11 39.6 10 249 74 - 1 34 52 - 1 24 30 - 1 36 48 - 1 22 34 -0.09 76 0 0 - 1 7 42 6 11 41.0 9 249 75 - 1 12 53 - 1 2 31 - 1 14 49 - 1 0 35 -0.09 77 0 0 - 0 45 34 6 11 42.3 8 249 76 - 0 50 46 - 0 40 23 - 0 52 42 - 0 38 26 -0.09 78 0 0 - 0 23 17 6 11 43.4 7 249 77 - 0 28 29 - 0 18 6 - 0 30 25 - 0 16 9 -0.09 79 0 0 - 0 0 52 6 11 44.4 6 249 78 - 0 6 4 0 4 20 - 0 8 1 0 6 16 -0.09 80 0 0 0 21 40 6 11 45.2 4 249 78 0 16 28 0 26 52 0 14 32 0 28 49 -0.08 81 0 0 0 44 20 6 11 45.8 3 249 79 0 39 8 0 49 32 0 37 11 0 51 29 -0.08 82 0 0 1 7 6 6 11 46.2 2 249 79 1 1 54 1 12 19 0 59 57 1 14 15 -0.07 83 0 0 1 29 59 6 11 46.5 1 249 80 1 24 46 1 35 12 1 22 50 1 37 8 -0.04 84 0 0 1 52 57 6 11 46.6 0 249 80 1 47 44 1 58 10 1 45 47 2 0 6 0.25 Uncertainty in time = +/- 3 secs Prediction of 2023 Jul 14.2 Data for the target star ------------------------ * name: UCAC4 346-083598 * constellation : Ophiuchus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 16 44 04.4492 DE: -20 49 06.418 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 16 44 04.4495 DE: -20 49 06.419 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.8 * B mag [mag]: 12.3 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (3705) Hotellasilla asteroid class: approx. diameter [km]: 18 approx. diameter ["]: 0.007 distance from Earth [AU]: 3.40930 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#54 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): 0.015", 0.001", 97.8° remarks: * orbital elements for (3705)Hotellasilla : Mean anomaly = 213.1475349439 deg Arg. of pericenter = 237.8579793651 deg Long. of node = 154.1867465155 deg Inclination = 1.4004829755 deg Eccentricity = 0.1679949621 Semimajor axis = 3.1304224495 AU Perihelion dist = 2.6045272488 AU Mag: H = 12.62, G = 0.15 Epoch of elements : MJD 60374.25268505 TDT (2024 Mar 05.2527) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#542023Apr24,1.34,2024,3,5,6.064445,0.007337,0.110094,7.524604,-0.559405,-0.005954,0.000760,0.000000,0.000000 -3.0733,-20.8642,91.89,-5.85,False UCAC4 346-083598,16.73456921,-20.8184495,12.25,11.79,11.54,0.0,0,,16.75835691,-20.8642276,7.14,6.94,0,0,0 3705,Hotellasilla,18.93,17.872,3.4093,0,0,1.386,-1.44,,1.8,0 0,213.1026,2024,3,5,237.8580,154.1867,1.4005,0.16799,3.13042,2.60453,12.62,5.0,0.15 1.186,0.0150,0.0010,98,0.0014,Known errors,1.16,0,-1,-1 20240305_083598,60139.21 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 14, 05:08 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org