IOTA/IOTA-ES occultation update for (98943) 2001 CC21 / UCAC4 613-016619 event on 2024 Jan 13, 23:54 UT Visible from Summary ------- On 2024 Jan 13 UT, the 0.604 km diameter asteroid (98943) 2001 CC21 will occult a 12.8 mag star in the constellation Auriga for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.02 mag to 17.81 mag (the magnitude of the asteroid) for at most 0.130 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: 6 * date and approx. time of event: 2024 Jan 13, 23:35 - 2024 Jan 14, 00:14 * geocentric midpoint of event [JD]: 2460323.49648016 * magnitude of target star: 12.80 * magnitude drop [mag]: 5.02 * estimated maximum duration [s]: 0.130 * Moon: 9 % sunlit, 107° distance * Sun: 140° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 1 * 1 sigma uncertainty interval [path widths]: +/- 10.48 * 1 sigma uncertainty interval [seconds]: +/- 2.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.055, +/- 0.029) * 1 sigma uncertainty ellipse (major, minor, PA): (0.057", 0.024", 73°) * approx speed of asteroid's shadow [km/s]: 4.5528 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 613-016619 by 98943 2001 CC21 on 2024 Jan 13 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 -158 0 0 33 6 22 0 14 8.3 + 1 51 31 33 6 37 33 6 7 33 11 51 33 0 53 .... -157 0 0 33 48 28 0 14 7.4 + 2 51 30 33 48 43 33 48 13 33 53 57 33 42 58 -0.57 -156 0 0 34 30 24 0 14 6.0 + 3 52 29 34 30 39 34 30 9 34 35 54 34 24 54 -0.59 -155 0 0 35 12 9 0 14 3.9 + 4 52 28 35 12 25 35 11 54 35 17 40 35 6 39 -0.60 -154 0 0 35 53 42 0 14 1.3 + 5 53 27 35 53 57 35 53 27 35 59 13 35 48 11 -0.60 -153 0 0 36 35 0 0 13 58.2 + 6 54 26 36 35 16 36 34 45 36 40 32 36 29 29 -0.61 -152 0 0 37 16 3 0 13 54.5 + 7 54 25 37 16 18 37 15 48 37 21 35 37 10 31 -0.61 -151 0 0 37 56 49 0 13 50.3 + 8 55 24 37 57 4 37 56 33 38 2 21 37 51 17 -0.62 -150 0 0 38 37 16 0 13 45.6 + 9 55 23 38 37 31 38 37 1 38 42 49 38 31 43 -0.62 -149 0 0 39 17 23 0 13 40.4 + 10 56 22 39 17 39 39 17 8 39 22 57 39 11 51 -0.62 -148 0 0 39 57 10 0 13 34.8 + 11 57 21 39 57 25 39 56 55 40 2 43 39 51 37 -0.62 -147 0 0 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-53 44 33 2 44 32 31 44 38 18 44 27 16 -0.66 43 0 0 43 56 50 23 39 28.6 29 289 -53 43 57 6 43 56 35 44 2 22 43 51 19 -0.66 44 0 0 43 20 28 23 39 15.5 28 289 -53 43 20 43 43 20 13 43 26 0 43 14 57 -0.66 45 0 0 42 43 41 23 39 2.6 27 290 -52 42 43 56 42 43 26 42 49 13 42 38 10 -0.66 46 0 0 42 6 30 23 38 50.0 27 291 -52 42 6 45 42 6 14 42 12 1 42 0 59 -0.66 47 0 0 41 28 55 23 38 37.5 26 292 -51 41 29 10 41 28 40 41 34 26 41 23 24 -0.66 48 0 0 40 50 57 23 38 25.4 25 293 -51 40 51 13 40 50 42 40 56 29 40 45 27 -0.66 49 0 0 40 12 39 23 38 13.5 24 293 -50 40 12 54 40 12 24 40 18 10 40 7 8 -0.66 50 0 0 39 34 0 23 38 2.0 23 294 -50 39 34 15 39 33 45 39 39 30 39 28 29 -0.66 51 0 0 38 55 1 23 37 50.8 22 295 -49 38 55 16 38 54 46 39 0 31 38 49 31 -0.66 52 0 0 38 15 44 23 37 39.9 21 296 -49 38 15 59 38 15 29 38 21 14 38 10 14 -0.66 53 0 0 37 36 10 23 37 29.4 20 296 -48 37 36 25 37 35 55 37 41 40 37 30 41 -0.66 54 0 0 36 56 20 23 37 19.3 19 297 -47 36 56 35 36 56 5 37 1 49 36 50 51 -0.66 55 0 0 36 16 15 23 37 9.5 18 298 -47 36 16 31 36 16 0 36 21 44 36 10 47 -0.66 56 0 0 35 35 58 23 37 0.2 17 298 -46 35 36 13 35 35 43 35 41 26 35 30 30 -0.66 57 0 0 34 55 28 23 36 51.4 16 299 -45 34 55 43 34 55 13 35 0 56 34 50 1 -0.66 58 0 0 34 14 48 23 36 43.0 15 299 -44 34 15 3 34 14 33 34 20 15 34 9 22 -0.66 59 0 0 33 33 59 23 36 35.1 14 300 -44 33 34 14 33 33 44 33 39 25 33 28 33 -0.67 60 0 0 32 53 2 23 36 27.7 13 301 -43 32 53 16 32 52 47 32 58 27 32 47 36 -0.67 61 0 0 32 11 58 23 36 20.8 12 301 -42 32 12 13 32 11 43 32 17 23 32 6 34 -0.67 62 0 0 31 30 50 23 36 14.4 11 302 -41 31 31 5 31 30 35 31 36 14 31 25 27 -0.68 63 0 0 30 49 39 23 36 8.6 10 302 -40 30 49 53 30 49 24 30 55 2 30 44 16 -0.68 64 0 0 30 8 25 23 36 3.3 9 303 -39 30 8 40 30 8 11 30 13 48 30 3 4 -0.69 65 0 0 29 27 12 23 35 58.7 8 303 -39 29 27 27 29 26 57 29 32 33 29 21 51 -0.70 66 0 0 28 46 0 23 35 54.6 7 304 -38 28 46 15 28 45 45 28 51 20 28 40 40 -0.71 67 0 0 28 4 51 23 35 51.1 5 304 -37 28 5 6 28 4 36 28 10 10 27 59 32 -0.73 68 0 0 27 23 46 23 35 48.2 4 305 -36 27 24 1 27 23 32 27 29 5 27 18 28 -0.75 69 0 0 26 42 48 23 35 46.0 3 305 -35 26 43 2 26 42 33 26 48 5 26 37 31 -0.80 70 0 0 26 1 57 23 35 44.4 2 306 -34 26 2 11 26 1 42 26 7 13 25 56 41 -0.89 71 0 0 25 21 15 23 35 43.4 1 306 -33 25 21 29 25 21 1 25 26 30 25 16 0 -1.20 Uncertainty in time = +/- 3 secs Prediction of 2023 Jul 12.0 Data for the target star ------------------------ * name: UCAC4 613-016619 * constellation : Auriga * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 04 45 13.7801 DE: +32 35 08.532 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 04 45 13.7801 DE: +32 35 08.532 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 12.8 * B mag [mag]: 13.2 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (98943) 2001 CC21 asteroid class: approx. diameter [km]: 1 approx. diameter ["]: 0.003 distance from Earth [AU]: 0.28210 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#210 date of fit: 2023 Mar 06 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): 0.057", 0.024", 72.548° remarks: * orbital elements for (98943)2001 CC21 : Mean anomaly = 224.4226845229 deg Arg. of pericenter = 179.4398486781 deg Long. of node = 75.4580149669 deg Inclination = 4.8078760837 deg Eccentricity = 0.2192430414 Semimajor axis = 1.0322821532 AU Perihelion dist = 0.8059614744 AU Mag: H = 18.80, G = 0.15 Epoch of elements : MJD 60322.99648005 TDT (2024 Jan 13.9965) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#2102023Mar06,0.13,2024,1,13,23.915524,0.048607,0.564868,-2.560243,0.220413,0.001898,-0.000160,0.000001,0.000000 -39.9945,32.6314,-176.56,-21.43,False UCAC4 613-016619,4.75382785,32.5857033,13.24,12.80,12.56,0.0,0,,4.77998803,32.6313701,5.02,4.81,0,0,0 98943,2001 CC21,17.81,0.604,0.2821,0,0,-6.313,6.85,,0.1,0 0,223.4863,2024,1,13,179.4398,75.4580,4.8079,0.21924,1.03228,0.80596,18.80,5.0,0.15 11.418,0.0567,0.0240,73,0.0309,Known errors,1.11,0,-1,-1 20240113_016619,60137.01 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 12, 00:19 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org