Observation campaign of several stellar occultation by asteroids with low probability in Algeria
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1 Center of Research in Astronomy, Astrophysics and Geophysics (Algiers Observatory) Observation campaign of several stellar occultation by asteroids with low probability in Algeria Presented by : Djounai BABA AISSA Associate Researcher in Astronomy ESOP XXXVII, Rokycany Observatory, (Czech Republic), baba.aissa.djounai@gmail.com ; d.babaaissa@craag.dz
2 Outline Introduction Participative Astronomy occultation in Algeria Occultation of Triton Stellar occultation by Kuiper Object 2014 MU69 Study of stellar occultation by Near Earth Asteroids Near Futur prospects Summary ESOP XXXVII, Rokycany Observatory, (Czech Republic), 2
3 Introduction ESOP XXXVII, Rokycany Observatory, (Czech Republic), 3
4 The Centre for Research in Astronomy Astrophysics and Geophysics (CRAAG) comes from the creation of the Algiers Observatory in 1890 and after from the Institute of Meteorology and Physics of the Globe in Algiers (IMPGA) in The name of L Observatoire d Alger remained long after the independence of Algeria in 1962 until ESOP XXXVII, Rokycany Observatory, (Czech Republic), 4
5 In 1980, the Algerian ministry of high study and research created the National Center for Astronomy, Astrophysics and Geophysics (CNAAG) and in 1985, they change the establishment of the status of research center in Algeria, CRAAG was created. 64 asteroids were discovered including 858 El Djezair on May 26th 1916 and 859 Bouzareah on October 2nd 1916 by the french astronomer Frederic Sy. The first asteroid has the arabic name of the city of Algiers and the second has the arabic name of the village where the observatory built. ESOP XXXVII, Rokycany Observatory, (Czech Republic), 5
6 ESOP XXXVII, Rokycany Observatory, (Czech Republic), 6
7 Here the instruments that we used to observe occultation. 1 Instruments that we can be moved throughout Algiers Celestron 8 with CGEM mount Celestron 11 with CGE Pro mount 2 Fixed Instruments at Algiers Observatory A 200 mm Apochromatique Refractor guide F/D 9 Richtey-Chretien Telescope 810 mm F=6400 mm from the italian society Dub Optika. ESOP XXXVII, Rokycany Observatory, (Czech Republic), 7
8 ESOP XXXVII, Rokycany Observatory, (Czech Republic), 8
9 Since 2012, we observed several positive stellar occultation by asteroid using visual method. We obtained for the first time a positive occultation using the video method with IOTA VTI Inserter during the observation of the Triton occultation on October 5, We also obtained a positive occultation using the video method with IOTA VTI Inserter during the observation of the occultation of the star TYC by 464 Megaira on January 12, We have also obtained several negative observations but very often the weather was against us. The 4 th of, we organized an expedition to observe the stellar occultation by the object of Kuiper 2014MU69 in the extreme south of Algeria but it's was cloudy. ESOP XXXVII, Rokycany Observatory, (Czech Republic), 9
10 Participative Astronomy occultation in Algeria ESOP XXXVII, Rokycany Observatory, (Czech Republic), 10
11 There are hundreds astronomical associations and clubs. There are more than 2,300 youth institutions (youth centers and science centers) across the country, including more than 80 institutions in Algiers which depend on the Ministry of Youth. There are also hundreds of cultural centers (which depend on the Ministry of Culture) throughout the national territory. An exhaustive census of more than 300 telescopes. So, I started to form a network to observe stellar occultation by asteroids since ESOP XXXVII, Rokycany Observatory, (Czech Republic), 11
12 First national meeting in asteroidal occultation for observing 861 Aïda and 444 Gyptis in December ESOP XXXVII, Rokycany Observatory, (Czech Republic), 12
13 ESOP XXXVII, Rokycany Observatory, (Czech Republic), 13
14 ESOP XXXVII, Rokycany Observatory, (Czech Republic), 14
15 ESOP XXXVII, Rokycany Observatory, (Czech Republic), 15
16 ESOP XXXVII, Rokycany Observatory, (Czech Republic), 16
17 17
18 18
19 Regional observation of the stellar occultation HIP by 5247 Krylov in Tichy (Bejaia) Sunday 06th August 2017 at 21h05mn UT ESOP XXXVII, Rokycany Observatory, (Czech Republic), 19
20 Freiberg (Germany), September
21 The path of the occultation band throughout algerian territory of the star HIP Of the constellation of Cygnus by 5247 Krylov. ESOP XXXVII, Rokycany Observatory, (Czech Republic), 21
22 Zoom on the occultation band around Béjaïa city ESOP XXXVII, Rokycany Observatory, (Czech Republic), 22
23 12 telescopes divided on 6 teams through the central center of the path occultation. Each team was composed by 2 or 3 personnes. Acherchour Hotel Syfax Lmaadhane ESOP XXXVII, Rokycany Observatory, (Czech Republic), 23
24 ESOP XXXVII, Rokycany Observatory, (Czech Republic), 24
25 ESOP XXXVII, Rokycany Observatory, (Czech Republic), 25
26 ESOP XXXVII, Rokycany Observatory, (Czech Republic), 26
27 ESOP XXXVII, Rokycany Observatory, (Czech Republic), 27
28 ESOP XXXVII, Rokycany Observatory, (Czech Republic), 28
29 ESOP XXXVII, Rokycany Observatory, (Czech Republic), 29
30 ESOP XXXVII, Rokycany Observatory, (Czech Republic), 30
31 The second national meeting on stellar occultation by asteroids on November 14, 2017 in Ghardaia. More than 11 Algerian departments represented by their associations or clubs participated with more than 30 people who used 20 telescopes to observe the occultation of the star TYC of Canis Major constellation by asteroid 392 Wilhelmina. ESOP XXXVII, Rokycany Observatory, (Czech Republic), 31
32
33 Overall distribution of the teams on the 7 observation sites of Laghouat and Ghardaïa departments for the observation of the stellar occultation by the asteroid 392 Wilhelmina ESOP XXXVII, Rokycany Observatory, (Czech Republic), 33
34 Overall distribution of the teams on the 7 observation sites of Laghouat and Ghardaïa departments for the observation of the stellar occultation by the asteroid 392 Wilhelmina Laghouat..... Berriane Dhayet Ben Dahoua Ghardaïa El-Atteuf City Numirate (Ghardaïa Aerport) Zelfana ESOP XXXVII, Rokycany Observatory, (Czech Republic), 34
35 ESOP XXXVII, Rokycany Observatory, (Czech Republic), 35
36 ESOP XXXVII, Rokycany Observatory, (Czech Republic), 36
37 ESOP XXXVII, Rokycany Observatory, (Czech Republic), 37
38 ESOP XXXVII, Rokycany Observatory, (Czech Republic), 38
39 ESOP XXXVII, Rokycany Observatory, (Czech Republic), 39
40 ESOP XXXVII, Rokycany Observatory, (Czech Republic), 40
41 On Saturday January 13, 2018 at 00h33mn local time, the star TYC of the constellation Taurus was occulted by the 464 Megaira. ESOP XXXVII, Rokycany Observatory, (Czech Republic), 41
42 On Saturday January 13, 2018 at 00h33mn local time, the star TYC of the constellation Taurus was occulted by the 464 Megaira. More than 30 persons of the algerian occultation network participed. ESOP XXXVII, Rokycany Observatory, (Czech Republic), 42
43 Global distribution on the Algerian territory of the observation sites of the stellar occultation by 464 Megaira 1 Ténès ESOP XXXVII, Rokycany Observatory, (Czech Republic), 43
44 Global distribution on the Algerian territory of the observation sites of the stellar occultation by 464 Megaira Bir El-Ater Negrine Ferkane ESOP XXXVII, Rokycany Observatory, (Czech Republic), 44
45 Global distribution on the City of Algiers of the observation sites of the stellar occultation by 464 Megaira ESOP XXXVII, Rokycany Observatory, (Czech Republic), 45
46 Global distribution on the City of Algiers of the observation sites of the stellar occultation by 464 Megaira ESOP XXXVII, Rokycany Observatory, (Czech Republic), 46
47 Global distribution on the City of Algiers of the observation sites of the stellar occultation by 464 Megaira ESOP XXXVII, Rokycany Observatory, (Czech Republic), 47
48 Global distribution on the City of Algiers of the observation sites of the stellar occultation by 464 Megaira ESOP XXXVII, Rokycany Observatory, (Czech Republic), 48
49 49
50 ESOP XXXVII, Rokycany Observatory, (Czech Republic), 50
51 ESOP XXXVII, Rokycany Observatory, (Czech Republic), 51
52 52
53 Occultation of the star UCAC by Triton on October 5 th 2017 ESOP XXXVII, Rokycany Observatory, (Czech Republic), 53
54 ESOP XXXVII, Rokycany Observatory, (Czech Republic), The study of Triton's atmosphere by the occultation method makes it possible to identify and understand its evolution in time. 54
55 Shadow 600 km below the central line ESOP XXXVII, Rokycany Observatory, (Czech Republic), Occultation band of Triton 55
56 Neptune Mag 7.6 Triton Mag 13.5 UCAC Mag 12.4 One night before occultation 56
57 57 Triton Neptune UCAC Two hours before occultation
58 During the occultation 58
59 Coordinates obtained by IOTA VTI Inserter 59
60 8 th International Workshop on Occultation and Eclipse, Istanbul (Turkey), March
61 Light Curve obtained by TANGRA software ESOP XXXVII, Rokycany Observatory, (Czech Republic), 61
62 After reduce data light Curve processed and normalized Probably a Central Flash or fluctuations Fluctuations Atmosphere Atmosphere Special thanks for Bruno Sicardy and Mike Kretlow ESOP XXXVII, Rokycany Observatory, (Czech Republic), 62
63 Center of Research in Astronomy, Astrophysics and Geophysics Expedition to Observe Stellar Occultation of Next New Horizons Spacecraft Flyby Target ULTIMA THULE 2014 MU69 at Tamanrasset (ALGERIA) on 4 ESOP XXXVII, Rokycany Observatory, (Czech Republic), 63
64 New Horizons Probe Goal : Flyby of Pluto system in 2015 and a Kuiper objet in
65 The Occultation of MU Star by the Kuiper Objet ULTIMA THULE 2014 MU 69 in August 4 th 2018 The prediction is based on a Gaia DR2 pre-release position for the star and the orbit estimate for ULTIMA THULE 2014MU69. This orbit includes all data up through March 21th The event will be at 01:24 UT. The time at Senegal is 1:21:30 and Colombia is 1:26 UT. Star position is RA 19:04:21.5, Dec -20:35:37 (J2000). TYC Star Magnitude of the occulted Star : 13.3 Duration of the occultation : 1 to 2 seconds ESOP XXXVII, Rokycany Observatory, (Czech Republic), 65
66 Professor Marc BUIE NASA supervisor of the occultation campaign of MU Star by the Kuiper Objet 2014 MU 69 in August 4 th 2018 ESOP XXXVII, Rokycany Observatory, (Czech Republic), 66
67 Chords obtained by the observation of the Stellar occultation of 2014 MU69 in July 17 th 2017, Argentina ESOP XXXVII, Rokycany Observatory, (Czech Republic), 67
68 Argentina ESOP XXXVII, Rokycany Observatory, (Czech Republic), 68
69 The path of the occultation in the world Map ESOP XXXVII, Rokycany Observatory, (Czech Republic), 69
70 The path of the occultation in Senegal, Mauritania and Mali ESOP XXXVII, Rokycany Observatory, (Czech Republic), 70
71 Distribution of the 23 NASA telescopes stations throughout the occultation band in Senegal ESOP XXXVII, Rokycany Observatory, (Czech Republic), 71
72 Zoom on the path prediction of the occultation in Tamanrasset 80 kilometers ESOP XXXVII, Rokycany Observatory, (Czech Republic), 72
73 Zoom on the latest path prediction of the occultation in Tamanrasset 90 kilometers ESOP XXXVII, Rokycany Observatory, (Czech Republic), 73
74 Illustration of the eventual shape of 2014 MU69 ESOP XXXVII, Rokycany Observatory, (Czech Republic), 74
75 Flyby illustration of the eventual double Kuiper objet 2014 MU69 by New horizons in January 1 st 2019 ESOP XXXVII, Rokycany Observatory, (Czech Republic), 75
76 ESOP XXXVII, Rokycany Observatory, (Czech Republic), 76
77 ESOP XXXVII, Rokycany Observatory, (Czech Republic), 77
78 ESOP XXXVII, Rokycany Observatory, (Czech Republic), 78
79 ESOP XXXVII, Rokycany Observatory, (Czech Republic), 79
80 ESOP XXXVII, Rokycany Observatory, (Czech Republic), 80
81 ESOP XXXVII, Rokycany Observatory, (Czech Republic), 81
82 Study of stellar occultation by asteroids with low probability ESOP XXXVII, Rokycany Observatory, (Czech Republic), 82
83 ESOP XXXVII, Rokycany Observatory, (Czech Republic), 83
84 ESOP XXXVII, Rokycany Observatory, (Czech Republic), 84
85 ESOP XXXVII, Rokycany Observatory, (Czech Republic), 85
86 ESOP XXXVII, Rokycany Observatory, (Czech Republic), 86
87 ESOP XXXVII, Rokycany Observatory, (Czech Republic), 87
88 ESOP XXXVII, Rokycany Observatory, (Czech Republic), August ESOP 2018 XXXVII, Rokycany Observatory, (Czech Republic), 88
89 ESOP XXXVII, Rokycany Observatory, (Czech Republic), 89
90 ESOP XXXVII, Rokycany Observatory, (Czech Republic), 90
91 I m interesting to observe Near Earth Asteroids by occultation method. There is 39 Near Earth Asteroids that have more than 4 kilometers of diameter. 6 of them are Potentially Hazardous Asteroids. ESOP XXXVII, Rokycany Observatory, (Czech Republic), 91
92 Next interesting occultation to observe in Algeria with the amateur network in Astronomy ESOP XXXVII, Rokycany Observatory, (Czech Republic), 92
93 ESOP XXXVII, Rokycany Observatory, (Czech Republic), 93
94 ESOP XXXVII, Rokycany Observatory, (Czech Republic), 94
95 Summary We are interesting by stellar occultation by asteroids with low probability observation like NEA (Near-Earth Asteroids) and TNO (TransNeptunian Objets). I hope to characterize next year some of the 39 Near-Earth Asteroids that have more than 4 kilometers using 5 telescopes coupled with IOTA occultation kit. We create an Algerian Amateurs Astronomers Network to observe stellar occultations by asteroids visually to develop participative astronomy in Algeria. We wish to create a relationship with other partners around the world and especially from IOTA in order to develop this research in Algeria. ESOP XXXVII, Rokycany Observatory, (Czech Republic), 95
96 Thank you for your attention! ESOP XXXVII, Rokycany Observatory, (Czech Republic), 96
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