The short orbital period binary star at the heart of the planetary nebula M 3-1★ [PDF]
Monthly Notices of the Royal Astronomical Society: Letters, 2018 We present the discovery of a 3h5m orbital-period binary star at the heart of the planetary nebula M 3-1 - the shortest period photometrically-variable central star known and second only to V458 Vul, in general.
David Jones +6 more
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A Method to Determine BeiDou GEO/IGSO Orbital Maneuver Time Periods
Sensors, 2019 Because there are different types of BeiDou constellations with participating geostationary orbit (GEO) and inclined geosynchronous orbit (IGSO) satellites, the maneuvering frequency of BeiDou satellites is higher than that of other navigation systems ...
Zhiwei Qin +7 more
doaj +1 more source
The American Mathematical Monthly, 1920 Mode of access: Internet.
Moulton, Forest Ray, 1872-1952. +5 more
openaire +1 more source
Elemental Abundances of Kepler Objects of Interest in APOGEE. I. Two Distinct Orbital Period Regimes Inferred from Host Star Iron Abundances [PDF]
, 2017 The Apache Point Observatory Galactic Evolution Experiment (APOGEE) has observed ∼600 transiting exoplanets and exoplanet candidates from Kepler (Kepler Objects of Interest, KOIs), most with ≥18 epochs. The combined multi-epoch spectra are of high signal-
Robert F. Wilson +16 more
semanticscholar +1 more source
Minimum Orbital Period of Precataclysmic Variables [PDF]
Astrophysical Journal, 2018 More than 20 precataclysmic variable (pre-CV) systems have now been discovered with very short orbital periods ranging from 250 minutes down to 68 minutes.
Lorne A. Nelson +3 more
semanticscholar +1 more source
Orbital maneuver technology of temporary networked satellites for earth exploration
Xibei Gongye Daxue Xuebao, 2022 It is very difficult to achieve effective coverage of hot-spot target in a short time period by earth perturbation for orbital maneuver, because the coverage gap of the temporary multi-satellites network in certain period of time is too large.
ZHAO Jun +5 more
doaj +1 more source
Orbital Index in Human Dry Skulls of East Indian Origin: A Cross-sectional Study [PDF]
International Journal of Anatomy Radiology and Surgery, 2023 Introduction: Orbital index demonstrates the proportion of the orbital length to the orbital width and varies with race, geographic region, and ethnicity.
Sayantan Das +3 more
doaj +1 more source
Revisiting Orbital Evolution in HAT-P-2 b and Confirmation of HAT-P-2 c
The Astronomical Journal, 2023 One possible formation mechanism for Hot Jupiters is that high-eccentricity gas giants experience tidal interactions with their host star that cause them to lose orbital energy and migrate inwards.
Zoë L. de Beurs +7 more
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Mean Orbital Elements for Geosynchronous Orbit - II - Orbital inclination, longitude of ascending node, mean longitude [PDF]
Journal of Astronomy and Space Sciences, 1990 The osculating orbital elements include the mean, secular, long period, and short period terms. The iterative algorithm used for conversion of osculating orbital elements to mean orbital elements is described.
Kyu-Hong Choi +3 more
doaj
The eccentric short-period orbit of the supergiant fast X-ray transient HD 74194 (=LM Vel) [PDF]
, 2015 Aims. We present the first orbital solution for the O-type supergiant star HD 74194, which is the optical counterpart of the supergiant fast X-ray transient IGR J08408-4503. Methods.
Alfaro, E. J. +7 more
core +2 more sources