IOTA/IOTA-ES occultation update for (1197) Rhodesia / UCAC4 363-129852 event on 2024 Oct 29, 17:00 UT Visible from Summary ------- On 2024 Oct 29 UT, the 48.2979793364117 km diameter asteroid (1197) Rhodesia will occult a 11.7 mag star in the constellation Sagittarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.53 mag to 16.19 mag (the magnitude of the asteroid) for at most 1.440 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 Oct 29, 16:56 - 2024 Oct 29, 17:03 * geocentric midpoint of event [JD]: 2460613.20835200 * magnitude of target star: 11.68 * magnitude drop [mag]: 4.53 * estimated maximum duration [s]: 1.440 * Moon: 7 % sunlit, 86° distance * Sun: 55° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 49 * 1 sigma uncertainty interval [path widths]: +/- 0.15 * 1 sigma uncertainty interval [seconds]: +/- 0.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.010, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.010", 0.002", 75°) * approx speed of asteroid's shadow [km/s]: 34.0062 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 363-129852 by 1197 Rhodesia on 2024 Oct 29 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 -109 0 0 5 16 12 16 56 56.1 1 108 54 5 2 11 5 30 14 4 57 54 5 34 32 .... -108 0 0 4 57 11 16 56 56.2 2 108 55 4 43 10 5 11 12 4 38 52 5 15 30 -0.02 -107 0 0 4 38 13 16 56 56.3 3 108 56 4 24 12 4 52 14 4 19 55 4 56 31 -0.07 -106 0 0 4 19 19 16 56 56.5 4 108 57 4 5 19 4 33 20 4 1 1 4 37 37 -0.09 -105 0 0 4 0 30 16 56 56.7 5 108 58 3 46 30 4 14 30 3 42 13 4 18 47 -0.10 -104 0 0 3 41 45 16 56 57.0 6 108 59 3 27 45 3 55 45 3 23 29 4 0 3 -0.11 -103 0 0 3 23 6 16 56 57.4 7 108 60 3 9 7 3 37 6 3 4 50 3 41 23 -0.11 -102 0 0 3 4 33 16 56 57.9 8 108 61 2 50 34 3 18 32 2 46 17 3 22 49 -0.12 -101 0 0 2 46 5 16 56 58.4 9 108 62 2 32 7 3 0 4 2 27 50 3 4 21 -0.12 -100 0 0 2 27 45 16 56 58.9 10 108 63 2 13 47 2 41 43 2 9 30 2 46 0 -0.12 - 99 0 0 2 9 31 16 56 59.5 11 108 64 1 55 33 2 23 29 1 51 17 2 27 46 -0.12 - 98 0 0 1 51 25 16 57 0.2 12 108 65 1 37 27 2 5 22 1 33 11 2 9 39 -0.13 - 97 0 0 1 33 26 16 57 1.0 13 108 66 1 19 29 1 47 23 1 15 13 1 51 39 -0.13 - 96 0 0 1 15 35 16 57 1.8 14 108 67 1 1 39 1 29 32 0 57 24 1 33 48 -0.13 - 95 0 0 0 57 53 16 57 2.7 15 108 68 0 43 58 1 11 49 0 39 42 1 16 5 -0.13 - 94 0 0 0 40 20 16 57 3.6 16 108 69 0 26 25 0 54 15 0 22 10 0 58 31 -0.13 - 93 0 0 0 22 56 16 57 4.6 17 108 70 0 9 2 0 36 51 0 4 46 0 41 6 -0.13 - 92 0 0 0 5 42 16 57 5.6 18 109 71 - 0 8 12 0 19 36 - 0 12 27 0 23 51 -0.13 - 91 0 0 - 0 11 23 16 57 6.8 19 109 72 - 0 25 16 0 2 31 - 0 29 31 0 6 46 -0.13 - 90 0 0 - 0 28 17 16 57 7.9 20 109 72 - 0 42 10 - 0 14 24 - 0 46 24 - 0 10 9 -0.13 - 89 0 0 - 0 45 0 16 57 9.2 21 109 73 - 0 58 52 - 0 31 8 - 1 3 7 - 0 26 53 -0.13 - 88 0 0 - 1 1 33 16 57 10.4 22 109 74 - 1 15 24 - 0 47 41 - 1 19 38 - 0 43 27 -0.13 - 87 0 0 - 1 17 54 16 57 11.8 23 109 75 - 1 31 45 - 1 4 3 - 1 35 59 - 0 59 49 -0.13 - 86 0 0 - 1 34 4 16 57 13.2 25 109 76 - 1 47 53 - 1 20 13 - 1 52 7 - 1 15 59 -0.13 - 85 0 0 - 1 50 1 16 57 14.6 26 109 76 - 2 3 50 - 1 36 11 - 2 8 4 - 1 31 57 -0.13 - 84 0 0 - 2 5 46 16 57 16.2 27 109 77 - 2 19 35 - 1 51 57 - 2 23 48 - 1 47 43 -0.14 - 83 0 0 - 2 21 19 16 57 17.7 28 109 78 - 2 35 7 - 2 7 31 - 2 39 20 - 2 3 17 -0.14 - 82 0 0 - 2 36 39 16 57 19.3 29 109 78 - 2 50 26 - 2 22 51 - 2 54 39 - 2 18 38 -0.14 - 81 0 0 - 2 51 45 16 57 21.0 30 109 79 - 3 5 32 - 2 37 58 - 3 9 45 - 2 33 45 -0.14 - 80 0 0 - 3 6 38 16 57 22.7 31 109 79 - 3 20 24 - 2 52 52 - 3 24 37 - 2 48 39 -0.14 - 79 0 0 - 3 21 18 16 57 24.5 32 109 80 - 3 35 3 - 3 7 32 - 3 39 15 - 3 3 20 -0.14 - 78 0 0 - 3 35 43 16 57 26.3 33 109 80 - 3 49 28 - 3 21 58 - 3 53 40 - 3 17 46 -0.14 - 77 0 0 - 3 49 54 16 57 28.2 34 109 80 - 4 3 38 - 3 36 10 - 4 7 50 - 3 31 58 -0.14 - 76 0 0 - 4 3 51 16 57 30.1 35 109 80 - 4 17 34 - 3 50 7 - 4 21 45 - 3 45 55 -0.14 - 75 0 0 - 4 17 33 16 57 32.1 36 109 80 - 4 31 15 - 4 3 50 - 4 35 26 - 3 59 38 -0.14 - 74 0 0 - 4 30 59 16 57 34.1 37 109 80 - 4 44 41 - 4 17 18 - 4 48 52 - 4 13 6 -0.14 - 73 0 0 - 4 44 11 16 57 36.2 38 109 79 - 4 57 52 - 4 30 30 - 5 2 3 - 4 26 18 -0.14 - 72 0 0 - 4 57 7 16 57 38.3 39 109 79 - 5 10 47 - 4 43 27 - 5 14 58 - 4 39 15 -0.14 - 71 0 0 - 5 9 47 16 57 40.5 40 109 79 - 5 23 27 - 4 56 8 - 5 27 37 - 4 51 57 -0.14 - 70 0 0 - 5 22 12 16 57 42.7 41 109 78 - 5 35 51 - 5 8 33 - 5 40 1 - 5 4 22 -0.14 - 69 0 0 - 5 34 20 16 57 44.9 42 109 78 - 5 47 58 - 5 20 42 - 5 52 8 - 5 16 31 -0.14 - 68 0 0 - 5 46 12 16 57 47.2 43 109 77 - 5 59 50 - 5 32 35 - 6 4 0 - 5 28 24 -0.14 - 67 0 0 - 5 57 48 16 57 49.5 44 109 76 - 6 11 24 - 5 44 11 - 6 15 34 - 5 40 1 -0.14 - 66 0 0 - 6 9 7 16 57 51.9 45 109 75 - 6 22 43 - 5 55 30 - 6 26 52 - 5 51 21 -0.14 - 65 0 0 - 6 20 9 16 57 54.3 46 109 75 - 6 33 44 - 6 6 33 - 6 37 53 - 6 2 23 -0.14 - 64 0 0 - 6 30 54 16 57 56.8 47 109 74 - 6 44 28 - 6 17 19 - 6 48 37 - 6 13 9 -0.14 - 63 0 0 - 6 41 22 16 57 59.2 48 109 73 - 6 54 55 - 6 27 47 - 6 59 4 - 6 23 38 -0.14 - 62 0 0 - 6 51 32 16 58 1.8 49 109 72 - 7 5 5 - 6 37 58 - 7 9 14 - 6 33 49 -0.14 - 61 0 0 - 7 1 25 16 58 4.3 50 109 71 - 7 14 58 - 6 47 52 - 7 19 6 - 6 43 43 -0.14 - 60 0 0 - 7 11 0 16 58 6.9 51 109 71 - 7 24 32 - 6 57 28 - 7 28 41 - 6 53 19 -0.14 - 59 0 0 - 7 20 18 16 58 9.5 52 109 70 - 7 33 49 - 7 6 46 - 7 37 57 - 7 2 37 -0.14 - 58 0 0 - 7 29 17 16 58 12.2 53 109 69 - 7 42 48 - 7 15 46 - 7 46 56 - 7 11 38 -0.14 - 57 0 0 - 7 37 59 16 58 14.9 54 109 68 - 7 51 29 - 7 24 28 - 7 55 37 - 7 20 20 -0.14 - 56 0 0 - 7 46 22 16 58 17.6 55 110 67 - 7 59 52 - 7 32 52 - 8 4 0 - 7 28 44 -0.14 - 55 0 0 - 7 54 27 16 58 20.4 56 110 66 - 8 7 56 - 7 40 58 - 8 12 4 - 7 36 50 -0.14 - 54 0 0 - 8 2 14 16 58 23.2 57 110 65 - 8 15 43 - 7 48 45 - 8 19 50 - 7 44 37 -0.14 - 53 0 0 - 8 9 42 16 58 26.0 58 110 64 - 8 23 10 - 7 56 14 - 8 27 17 - 7 52 6 -0.14 - 52 0 0 - 8 16 52 16 58 28.8 59 110 63 - 8 30 19 - 8 3 24 - 8 34 26 - 7 59 16 -0.14 - 51 0 0 - 8 23 43 16 58 31.7 60 111 62 - 8 37 10 - 8 10 15 - 8 41 17 - 8 6 8 -0.14 - 50 0 0 - 8 30 15 16 58 34.6 61 111 61 - 8 43 41 - 8 16 48 - 8 47 48 - 8 12 41 -0.14 - 49 0 0 - 8 36 28 16 58 37.5 62 111 60 - 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Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 363-129852 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 04 48.8794 DE: -17 31 23.326 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 04 48.8794 DE: -17 31 23.326 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.7 * B mag [mag]: 13.1 * Diameter [mas]: 0.20 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1197) Rhodesia asteroid class: approx. diameter [km]: 48 approx. diameter ["]: 0.019 distance from Earth [AU]: 3.48160 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#56 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): 0.010", 0.002", 75.458° remarks: * orbital elements for (1197)Rhodesia : Mean anomaly = 88.7502639432 deg Arg. of pericenter = 277.0106531584 deg Long. of node = 255.6077471500 deg Inclination = 12.9785084118 deg Eccentricity = 0.2346792171 Semimajor axis = 2.8830092610 AU Perihelion dist = 2.2064269047 AU Mag: H = 10.22, G = 0.15 Epoch of elements : MJD 60612.70835183 TDT (2024 Oct 29.7084) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#562023Apr24,1.44,2024,10,29,17.000448,-0.006973,0.142539,19.174971,0.855780,0.004836,0.000403,-0.000001,0.000000 -21.9613,-17.5220,-79.09,-13.77,False UCAC4 363-129852,18.08024432,-17.5231462,13.12,11.68,10.90,0.2,0,,18.10406926,-17.5219690,4.52,4.85,0,0,0 1197,Rhodesia,16.19,48.803,3.4816,0,0,3.386,2.16,,2.4,0 0,88.6076,2024,10,29,277.0107,255.6077,12.9785,0.23468,2.88301,2.20643,10.22,5.0,0.15 1.153,0.0103,0.0021,75,0.0030,Known errors,0.82,0,-1,-1 20241029_129852,60140.67 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 16:00 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org