IOTA/IOTA-ES occultation update for (845) Naema / TYC 2371-02897-1 event on 2022 Dec 16, 16:49 UT Visible from Russia, Europe Summary ------- On 2022 Dec 16 UT, the 56.1 km diameter asteroid (845) Naema will occult a 10.5 mag star in the constellation Taurus for observers along a path across Russia, Europe. In the case of an occultation, the combined light of the asteroid and the star will drop by 4.13 mag to 14.56 mag (the magnitude of the asteroid) for at most 4.670 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: 2022 Dec 16, 16:43 - 2022 Dec 16, 16:56 * geocentric midpoint of event [JD]: 2459930.20110479 * magnitude of target star: 10.45 * magnitude drop [mag]: 4.13 * estimated maximum duration [s]: 4.670 * Moon: 47 % sunlit, 110° distance * Sun: 160° distance * rough path description: Russia, Europe The occultation path -------------------- * approximate projected width [km]: 79 * 1 sigma uncertainty interval [path widths]: +/- 0.25 * 1 sigma uncertainty interval [seconds]: +/- 2.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.024, +/- 0.010) * 1 sigma uncertainty ellipse (major, minor, PA): (0.026", 0.001", 67°) * approx speed of asteroid's shadow [km/s]: 12.0071 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 2371-02897-1 by 845 Naema on 2022 Dec 16 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 - 32 0 0 .. .. .... .. .. .. .. .. .. 37 5 40 .. .. .. 37 19 42 .. .. .. .... - 31 0 0 37 18 6 16 55 52.8 1 51 17 37 45 41 36 50 48 37 59 48 36 37 2 .... - 30 0 0 37 58 10 16 55 52.5 2 52 16 38 25 54 37 30 43 38 40 7 37 16 52 -0.84 - 29 0 0 38 38 25 16 55 51.9 3 52 15 39 6 18 38 10 48 39 20 36 37 56 53 -0.89 - 28 0 0 39 18 48 16 55 51.0 4 53 14 39 46 51 38 51 3 40 1 13 38 37 3 -0.91 - 27 0 0 39 59 19 16 55 49.9 5 54 13 40 27 31 39 31 24 40 41 57 39 17 20 -0.92 - 26 0 0 40 39 54 16 55 48.6 6 54 12 41 8 15 40 11 51 41 22 47 39 57 43 -0.93 - 25 0 0 41 20 33 16 55 47.1 7 55 11 41 49 3 40 52 22 42 3 39 40 38 10 -0.93 - 24 0 0 42 1 14 16 55 45.4 8 56 10 42 29 53 41 32 55 42 44 33 41 18 38 -0.94 - 23 0 0 42 41 55 16 55 43.4 9 56 9 43 10 42 42 13 27 43 25 27 41 59 7 -0.94 - 22 0 0 43 22 34 16 55 41.2 10 57 8 43 51 29 42 53 58 44 6 18 42 39 34 -0.94 - 21 0 0 44 3 9 16 55 38.8 11 58 7 44 32 12 43 34 26 44 47 5 43 19 57 -0.95 - 20 0 0 44 43 38 16 55 36.3 12 59 6 45 12 49 44 14 48 45 27 46 44 0 16 -0.95 - 19 0 0 45 24 1 16 55 33.5 13 59 5 45 53 18 44 55 3 46 8 19 44 40 28 -0.95 - 18 0 0 46 4 14 16 55 30.6 14 60 4 46 33 38 45 35 9 46 48 43 45 20 31 -0.95 - 17 0 0 46 44 16 16 55 27.5 15 61 3 47 13 47 46 15 5 47 28 55 46 0 23 -0.95 - 16 0 0 47 24 5 16 55 24.3 16 62 2 47 53 43 46 54 49 48 8 54 46 40 4 -0.95 - 15 0 0 48 3 40 16 55 20.8 17 62 1 48 33 24 47 34 18 48 48 38 47 19 31 -0.96 - 14 0 0 48 43 0 16 55 17.3 17 63 0 49 12 48 48 13 32 49 28 6 47 58 42 -0.96 - 13 0 0 49 22 1 16 55 13.6 18 64 -1 49 51 55 48 52 29 50 7 15 48 37 36 -0.96 - 12 0 0 50 0 43 16 55 9.8 19 65 -2 50 30 41 49 31 6 50 46 4 49 16 12 -0.96 - 11 0 0 50 39 4 16 55 5.8 20 66 -3 51 9 7 50 9 24 51 24 31 49 54 27 -0.96 - 10 0 0 51 17 4 16 55 1.8 21 67 -4 51 47 10 50 47 20 52 2 36 50 32 21 -0.96 - 9 0 0 51 54 39 16 54 57.6 22 68 -4 52 24 48 51 24 52 52 40 16 51 9 52 -0.96 - 8 0 0 52 31 49 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0 43 58 30 16 43 27.2 9 304 -17 44 27 33 43 29 47 44 42 27 43 15 18 -1.05 -163 0 0 43 17 50 16 43 25.3 8 305 -16 43 46 45 42 49 14 44 1 35 42 34 49 -1.06 -162 0 0 42 37 6 16 43 23.6 7 306 -16 43 5 53 42 8 38 43 20 38 41 54 17 -1.07 -161 0 0 41 56 20 16 43 22.1 6 307 -15 42 24 59 41 28 0 42 39 40 41 13 44 -1.09 -160 0 0 41 15 35 16 43 20.9 5 307 -14 41 44 5 40 47 23 41 58 41 40 33 10 -1.12 -159 0 0 40 34 51 16 43 19.9 4 308 -13 41 3 12 40 6 48 41 17 44 39 52 39 -1.16 -158 0 0 39 54 11 16 43 19.1 3 308 -12 40 22 23 39 26 17 40 36 50 39 12 12 -1.23 -157 0 0 39 13 36 16 43 18.5 2 309 -11 39 41 40 38 45 51 39 56 2 38 31 51 -1.39 -156 0 0 38 33 9 16 43 18.2 1 310 -10 39 1 3 38 5 32 39 15 20 37 51 37 -2.00 -155 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. 38 34 48 .. .. .. .... Uncertainty in time = +/- 3 secs Prediction of 2022 Dec 1.1 Data for the target star ------------------------ * name: TYC 2371-02897-1 * constellation : Taurus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 04 12 10.4755 DE: +30 34 36.657 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 04 12 10.4754 DE: +30 34 36.658 * position source: Gaia EDR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 10.5 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (845) Naema asteroid class: approx. diameter [km]: 56 approx. diameter ["]: 0.039 distance from Earth [AU]: 2.00560 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#59 date of fit: 2022 Nov 22 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): 0.026", 0.001", 67.09° remarks: * orbital elements for (845)Naema : Mean anomaly = 89.6018007116 deg Arg. of pericenter = 292.6362473632 deg Long. of node = 42.9916389969 deg Inclination = 12.6153380526 deg Eccentricity = 0.0694113059 Semimajor axis = 2.9373751453 AU Perihelion dist = 2.7334881005 AU Mag: H = 10.18, G = 0.15 Epoch of elements : MJD 59929.70097222 TDT (2022 Dec 16.7010) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#592022Nov22,4.67,2022,12,16,16.826515,-0.010745,0.701845,-6.776363,-0.104414,0.001926,-0.000588,0.000001,0.000000 85.7006,30.6367,-73.48,-23.33,False TYC 2371-02897-1,4.20290985,30.5768493,0.00,10.45,0.00,0.0,0,,4.22716331,30.6367405,4.13,0.00,0,0,0 845,Naema,14.56,56.1,2.0056,0,0,-2.302,-0.46,,3.2,0 0,89.4646,2022,12,16,292.6362,42.9916,12.6153,0.06941,2.93738,2.73349,10.20,5.0,0.15 1.254,0.0260,0.0011,67,0.0098,Known errors,-1.00,-1,-1,-1 20221216_2897-1,59914.08 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Dec 01, 02:01 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org