Project of the network for occultation phenomena television observations
The project aimed at the equipment of observational stations of the existing network by the analogous television devices is proposed. Possibilities of a new observation program using the method of occultations for studying the kinematics of multiple star systems, Solar System small bodies, as well a...
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| Дата: | 2005 |
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Головна астрономічна обсерваторія НАН України
2005
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| Назва видання: | Кинематика и физика небесных тел |
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| Цитувати: | Project of the network for occultation phenomena television observations / L.V. Kazantseva, V.S. Kislyuk, V.V. Kleshchonok // Кинематика и физика небесных тел. — 2005. — Т. 21, № 5-додаток. — С. 541-543. — Бібліогр.: 4 назв. — англ. |
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irk-123456789-797182015-04-04T03:01:57Z Project of the network for occultation phenomena television observations Kazantseva, L.V. Kislyuk, V.S. Kleshchonok, V.V. MS6: New Trends, Research Directions, and Perspective Programs in the Field of Astronomy and Astrophysics The project aimed at the equipment of observational stations of the existing network by the analogous television devices is proposed. Possibilities of a new observation program using the method of occultations for studying the kinematics of multiple star systems, Solar System small bodies, as well as figure of the marginal zone of the Moon are considered. 2005 Article Project of the network for occultation phenomena television observations / L.V. Kazantseva, V.S. Kislyuk, V.V. Kleshchonok // Кинематика и физика небесных тел. — 2005. — Т. 21, № 5-додаток. — С. 541-543. — Бібліогр.: 4 назв. — англ. 0233-7665 http://dspace.nbuv.gov.ua/handle/123456789/79718 en Кинематика и физика небесных тел Головна астрономічна обсерваторія НАН України |
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MS6: New Trends, Research Directions, and Perspective Programs in the Field of Astronomy and Astrophysics MS6: New Trends, Research Directions, and Perspective Programs in the Field of Astronomy and Astrophysics |
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MS6: New Trends, Research Directions, and Perspective Programs in the Field of Astronomy and Astrophysics MS6: New Trends, Research Directions, and Perspective Programs in the Field of Astronomy and Astrophysics Kazantseva, L.V. Kislyuk, V.S. Kleshchonok, V.V. Project of the network for occultation phenomena television observations Кинематика и физика небесных тел |
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The project aimed at the equipment of observational stations of the existing network by the analogous television devices is proposed. Possibilities of a new observation program using the method of occultations for studying the kinematics of multiple star systems, Solar System small bodies, as well as figure of the marginal zone of the Moon are considered. |
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Article |
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Kazantseva, L.V. Kislyuk, V.S. Kleshchonok, V.V. |
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Kazantseva, L.V. Kislyuk, V.S. Kleshchonok, V.V. |
| author_sort |
Kazantseva, L.V. |
| title |
Project of the network for occultation phenomena television observations |
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Project of the network for occultation phenomena television observations |
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Project of the network for occultation phenomena television observations |
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Project of the network for occultation phenomena television observations |
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Project of the network for occultation phenomena television observations |
| title_sort |
project of the network for occultation phenomena television observations |
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Головна астрономічна обсерваторія НАН України |
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2005 |
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MS6: New Trends, Research Directions, and Perspective Programs in the Field of Astronomy and Astrophysics |
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http://dspace.nbuv.gov.ua/handle/123456789/79718 |
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Project of the network for occultation phenomena television observations / L.V. Kazantseva, V.S. Kislyuk, V.V. Kleshchonok // Кинематика и физика небесных тел. — 2005. — Т. 21, № 5-додаток. — С. 541-543. — Бібліогр.: 4 назв. — англ. |
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Кинематика и физика небесных тел |
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2025-07-06T03:43:30Z |
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2025-07-06T03:43:30Z |
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| fulltext |
PROJECT OF THE NETWORK FOR OCCULTATION PHENOMENA
TELEVISION OBSERVATIONS
L. V. Kazantseva1, V. S. Kislyuk2, V. V. Kleshchonok1
1Astronomical Observatory, National Taras Shevchenko University of Kyiv
3 Observatorna Str., 04053 Kyiv, Ukraine
e-mail: likaz@observ.univ.kiev.ua
2Main Astronomical Observatory, NAS of Ukraine
27 Akademika Zabolotnoho Str., 03680 Kyiv, Ukraine
The project aimed at the equipment of observational stations of the existing network by the analo-
gous television devices is proposed. Possibilities of a new observation program using the method
of occultations for studying the kinematics of multiple star systems, Solar System small bodies, as
well as figure of the marginal zone of the Moon are considered.
INTRODUCTION
Occultations of celestial objects are the most ancient phenomena, which can be observable from the Earth. Due
to their simplicity, these observations are the most popular and regular. Over 400 years they have been carried
out in 30 countries of the world; about ten thousand of the phenomena are annually registered. In spite of
the development of new observation techniques, the interest to them remains till now. The range of problems
solved by means of occultation observations is being extended.
The Astronomical Observatory of the Kyiv National University (AO KNU) during 40 years of coordina-
tion efforts on occultation observations has developed and now maintains a network of observational stations
on the territory of the former USSR (Fig. 1). The Kyiv database of lunar occultations contains more than
25 000 results of observations, obtained by 500 observers at 80 stations. We have close contacts with the IOTA
and ILOC centers and now this activity is being continued.
Figure 1. Network sites (1963–2004)
The new observation program by the use of the method of occultations gives possibilities for studying
the kinematics of multiple star systems, Solar System small bodies, as well as figure of the marginal zone of
the Moon. Accumulation of such precise observations from different points of the Earth will also allow us
to avoid personal errors of observers and to receive the reliable information on the irregularity of the Earth’s
rotation and secular changes in the Moon’s movement.
c© L. V. Kazantseva, V. S. Kislyuk, V. V. Kleshchonok, 2004
541
THE NEW ASTRONOMICAL TELEVISION SYSTEM “SPALAKH”
Astronomers of AO KNU have a more than the 80 years experience in the observations of the occultations of stars
by the Moon. Last year the new television system “Spalakh” was created at the observatory for observations of
star occultations using a precise reference time. The time accuracy of the television system is equal to 50 ms,
and limit star magnitude is equal to 12 mag for the Repsold refractor (D = 20 cm, F = 4 m). The software for
recording TV signal together with time scale and for processing observations was created. A reference time
accuracy of a fixation event time is equal to 10–15 ms. At present the television system is active used for
occultation observations. “Spalakh” can work in expeditions and stationary conditions and has a number of
advantages in comparison with other methods of observations (see for example Table 1).
Table 1. Approximate errors of measurements of the occultations of double stars
Measured Quantity Technique
Visual Photoelectric Television
Limb Angular Velocity (′′/s) 0.2 – 0.5 0.001 0.02
Timing (s) ±0.2 ±0.002 <0.050
Magnitude difference (mag) ±0.2 ±0.04 ±0.01
Magnitude range (mag) ∼2 ∼3.5 ∼5
Limiting Angular Resolution (′′) 0.05 ± 0.05 0.005 ± 0.002 0.01 ± 0.005
The “Spalakh” system includes the following components: television camera “Sanyo VCB-3574IRP”, web-
camera, GPS-receiver, computer with a frame grabber as well as software, which consist of the following pro-
grams:
1. VideoCap (for observation by means of the television system);
2. GPSwatch (for determination of system time using GPS-receiver);
3. OccultDark (for observation processing);
4. Tardis (for synchronization of computer system time in a local network).
The complex program includes:
• programs of predictions with the map, showing the location of the star at the moment of the occultation
(total and grazing occultations of stars by the Moon, stars by asteroids, mutual eclipses and occultations
of the major satellites of Jupiter, Saturn, and Uranus);
• software for observations with the television system “Spalakh”;
• programs of reduction of occultation observations.
POSSIBILITIES FOR APPLICATIONS OF THE COMPLEX “SPALAKH”
The television complex “Spalakh” may be productively used not only for observations of lunar occultations
but also for study the kinematics of multiple star systems and Solar System small bodies. Some of possible
applications of the complex are summarized in Table 2.
CONCLUSION
Increasing accuracy of modern lunar ephemerides and star catalogues contributes to the improvement of ob-
servation methods and cooperation between observers. We hope that the proposed project on an international
observational network, which involves stations with analogous television systems for observations, will be useful.
By now, some institutions are agreed to take part in the project (see Table 3).
542
Table 2. Some possible applications of the complex “Spalakh”
Possible observations Technique
Stellar occultations by planets – information about the shape and structure of possible
and their satellites [1] atmospheres of the occulting bodies
– determination of the normal reflectance of satellites
– analysis of ring systems
– monitoring the freezing of the Pluto’s atmosphere due to
the growth of the distance from the Sun and the resulting
decreasing of energy budget at Pluto
Asteroidal occultations [2] – more observers distributed across the paths provide
determinations of asteroid shapes
– possible observations of satellites of minor planets
Mutual Occultations and Eclipses – very accurate astrometric measurements and several physical
of Satellites [3] characteristics of the surfaces can be inferred from their
observations
– accurate astrometric positions for dynamical studies of
motion of satellites
Double star occultations [4] – discovery of new multiple systems
– kinematics of multiple star systems
Table 3. Prospective Ukrainian Network of Television Observations of Occultations
No. Partners Station Telescope Objective
Diameter, cm
1. Astronomical Observatory of the National Kyiv, Refractor Merc–Repsold 24
Taras Shevchenko University of Kyiv Lisnyky AZT-14 48
AZT-8 70
2. Poltava Gravimetrical Observatory, Poltava AVR-2 24
NAS of Ukraine
3. Space Research Laboratory Uzhhorod AVR-2 24
of the Uzhhorod National University
4. Astronomical Observatory Kryzhanivka, Schmidt 20
of the Odesa National University Mayaky Ritchey–Chretien 60
5. Astronomical Institute Kharkiv Reflector 27
of the Kharkiv National University AZT-7 20
Refractor 20
6. Nikolaev Astronomical Observatory Mykolaiv Guide of zonal astrograph 11.5
7. Main Astronomical Observatory, Kyiv, Refractor 40
NAS of Ukraine Golosiiv
[1] Beisker W., Bode H., Dunham D., et al. The Investigation of Planetary Atmospheres by Stellar Occultations //
Solar Eclipse Symposium ESO, Garching, Germany, 1999.–P. 2B.
[2] Elliot J., Dunham E., Olkin C. Exploring Small Bodies in the outer Solar System with Stellar Occultations //
ASP Conf. Ser.–1995.–73.–P. 285–295.
[3] Mallama A. Observing Campaign: Mutual Phenomena of the Galilean satellites // IAPPP Communications.–
1990.–N 42.–P. 36–43.
[4] White N. Stellar Multiplicity Discovery by Lunar Occultations // ASP Conf. Ser.–1992.–32.–P. 486–491.
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