Additional Acceleration on Spacecrafts and Corresponding Theory for Aeronautic Manufacturing and Space Shuttle Design

2011 ◽  
Vol 199-200 ◽  
pp. 1122-1125 ◽  
Author(s):  
Wei Jia Zhang ◽  
Yang Lei
Keyword(s):  
Space Shuttle ◽  
Orbital Evolution ◽  
The Sun ◽  
Radio Tracking ◽  
Independent Research ◽  
Constant Acceleration ◽  
Mechanics Analysis ◽  
Evolution Study ◽  
Pioneer 10

Space probes now asks for a correction in aeronautic mechanics. Analysis of the radio tracking data from the Pioneer 10/11 spacecraft at distances between about 20–70 AU from the Sun has consistently indicated the presence of a constant acceleration of 8.6× 10−8 cm/s−2 directed towards the Sun. Currently, an independent research rises from the planetary long-term orbital evolution study and may be helpful to understand the nature of Pioneer Anomaly. Furthermore, calculation shows that the Pioneer data match with the new discovery’s prediction very well. Such nova theory will improve spacecraft and space shuttle design, and could enhance the accuracy, ensuring them into the designed orbit prompt.

Another Potential Explanation for Pioneer Anomaly Cosmic Drag of an Orbit

2012 ◽  
Vol 433-440 ◽  
pp. 1587-1591
Author(s):  
Wei Jia Zhang
Keyword(s):  
Orbital Evolution ◽  
The Sun ◽  
Radio Tracking ◽  
Independent Research ◽  
Constant Acceleration ◽  
Potential Explanation ◽  
Pioneer Anomaly ◽  
Evolution Study ◽  
Pioneer 10

Analysis of the radio tracking data from the Pioneer 10/11 spacecraft at distances between about 20–70 AU from the Sun has consistently indicated the presence of a constant acceleration of 8.6× 10−8 cm/s−2 directed towards the Sun. This has been one of the most interesting and intriguing astrophysical problems in the last decade. Currently, an independent research rises from the planetary long-term orbital evolution study and may be helpful to understand the nature of Pioneer Anomaly. Furthermore, calculation shows that the Pioneer data match with the new discovery’s prediction very well.

scholarly journals On the orbital evolution of 2020 AV2, the first asteroid ever observed to go around the Sun inside the orbit of Venus

2020 ◽  
Vol 494 (1) ◽  
pp. L6-L10 ◽  
Author(s):  
C de la Fuente Marcos ◽  
R de la Fuente Marcos
Keyword(s):  
Orbital Evolution ◽  
Gravitational Perturbation ◽  
The Sun ◽  
Moon System ◽  
Resonant Orbit ◽  
The Earth ◽  
Short Period ◽  
Orbital Periods ◽  
Near Earth Objects

ABSTRACT The innermost section of the Solar system has not been extensively studied because minor bodies moving inside Earth’s orbit tend to spend most of their sidereal orbital periods at very low solar elongation, well away from the areas more frequently observed by programs searching for near-Earth objects. The survey carried out from the Zwicky Transient Facility (ZTF) is the first one that has been able to detect multiple asteroids well detached from the direct gravitational perturbation of the Earth–Moon system. ZTF discoveries include 2019 AQ3 and 2019 LF6, two Atiras with the shortest periods among known asteroids. Here, we perform an assessment of the orbital evolution of 2020 AV2, an Atira found by ZTF with a similarly short period but following a path contained entirely within the orbit of Venus. This property makes it the first known member of the elusive Vatira population. Genuine Vatiras, those long-term dynamically stable, are thought to be subjected to the so-called von Zeipel–Lidov–Kozai oscillation that protects them against close encounters with both Mercury and Venus. However, 2020 AV2 appears to be a former Atira that entered the Vatira orbital domain relatively recently. It displays an anticoupled oscillation of the values of eccentricity and inclination, but the value of the argument of perihelion may circulate. Simulations show that 2020 AV2 might reach a 3:2 resonant orbit with Venus in the future, activating the von Zeipel–Lidov–Kozai mechanism, which in turn opens the possibility to the existence of a long-term stable population of Vatiras trapped in this configuration.

scholarly journals A MISSION TO TEST THE PIONEER ANOMALY

2002 ◽  
Vol 11 (10) ◽  
pp. 1545-1551 ◽  
Author(s):  
JOHN D. ANDERSON ◽  
SLAVA G. TURYSHEV ◽  
MICHAEL MARTIN NIETO
Keyword(s):  
Doppler Frequency ◽  
Space Mission ◽  
Relativistic Cosmology ◽  
Tracking Data ◽  
Radio Tracking ◽  
Constant Acceleration ◽  
Spacecraft Design ◽  
Design Considerations ◽  
Pioneer Anomaly ◽  
Pioneer 10

Analysis of the radio tracking data from the Pioneer 10/11 spacecraft has consistently indicated the presence of an anomalous small Doppler frequency drift. The drift can be interpreted as being due to a constant acceleration of aP = (8.74 ± 1.33) × 10-8 cm/s 2 directed towards the Sun. Although it is suspected that there is a systematic origin to the effect, none has been found. The nature of this anomaly has become of growing interest in the fields of relativistic cosmology, astro- and gravitational physics as well as in the areas of spacecraft design and high-precision navigation. We present a concept for a designated deep-space mission to test the discovered anomaly. A number of critical requirements and design considerations for such a mission are outlined and addressed.

scholarly journals Testing the local spacetime dynamics by heliospheric radiocommunication methods

2008 ◽  
Vol 26 (4) ◽  
pp. 727-730
Author(s):  
H.-J. Fahr ◽  
M. Siewert
Keyword(s):  
Relativistic Effects ◽  
Careful Study ◽  
The Sun ◽  
Radio Tracking ◽  
Astronomical Observations ◽  
Distant Galaxies ◽  
Gravity Fields ◽  
General Relativistic ◽  
Pioneer 10 ◽  
Cosmological Spacetime

Abstract. According to general relativistic theories, cosmological spacetime is dynamic. This prediction is in excellent agreement with the huge majority of astronomical observations on large cosmic scales, especially the observations of cosmological redshifts of distant galaxies. However, on scales of heliospheric distances, verifications of general relativistic effects are based on Schwarzschild metric tests or kinetical corrections, such as the perihelion motion of Mercury, photon deflection at the Sun and gravitational photon redshifts in central gravity fields. As we will show in this paper, there is, however, a chance to detect new cosmologically relevant features on heliospheric scales by careful study of photon propagations in the local spacetime metrics, based on red- or blueshifts as a clear, but up to now overlooked, signature of the local spacetime dynamics. Thus, we propose the challenging possibility of carrying out experiments of cosmological relevance by simply using high-precision radio tracking of heliospheric spaceprobes, as already practised in cases like Pioneer-10/11, Galileo and Ulysses.

scholarly journals ESTIMATION OF PERIOD OF LONG-TERM OSCILLATIONS OF FACULAR FORMATIONS ON THE SUN

2019 ◽  
Author(s):  
P.V. Strekalova ◽  
◽  
A.A. Solov’ev ◽  
V.V. Smirnova ◽  
Y.A. Nagovitsyn ◽  
...  
Keyword(s):  
The Sun

scholarly journals Closing up onto our sun: solar imaging

2020 ◽  
Vol 240 ◽  
pp. 07011
Author(s):  
Kushagra Shrivastava ◽  
Keith Wen Kai Chia ◽  
Kang Jun Wong ◽  
Alfred Yong Liang Tan ◽  
Hwee Tiang Ning
Keyword(s):  
Solar Activity ◽  
The Sun ◽  
Research Needs ◽  
Large Numbers ◽  
Wide Range ◽  
Future Science ◽  
Insight Into ◽  
Term Data ◽  
Made In

Solar activity research provides insight into the Sun’s past, future (Science Daily, 2018). The solar activity includes observations of large numbers of intense sunspots, flares, and other phenomena; and demands a wide range of techniques and measurements on the observations. This research needs long term data collection before critical analyses can occur, to generate meaningful learning and knowledge. In this project, we will use solar imaging to make observations of solar activity, and take our baby steps to make contributions in citizen science. Observations will be made in 3 wavelengths to gain a more thorough analysis by looking at different perspectives of the Sun, namely H-Alpha, Calcium-K, and white light.

scholarly journals Long-term evolution of coronal holes on the Sun and occurrence frequencies of magnetic storms with gradual commencements

2021 ◽  
Vol 2103 (1) ◽  
pp. 012038
Author(s):  
S Veretenenko ◽  
M Ogurtsov ◽  
V Obridko ◽  
A Tlatov
Keyword(s):  
Coronal Holes ◽  
Long Term Evolution ◽  
Magnetic Storms ◽  
Time Shift ◽  
Time Interval ◽  
The Sun ◽  
Close Link ◽  
Sunspot Numbers ◽  
Term Evolution

Abstract Long-term evolution of areas with open configuration of magnetic field (coronal holes) on the Sun reconstructed on the basis of H-alpha synoptic charts for the period 1887-2016 was studied and compared with annual occurrence frequencies of magnetic storms with gradual (GC) commencements. It was found that correlation between yearly values of coronal hole (CH) areas and sunspot numbers with no time shift is negative and not strong, but increases up to ∼0.6-0.7 when CH areas are delayed by 4-5 years relative to sunspot numbers. Temporal variations of CH areas in the Northern and Southern hemispheres are characterized by dominant ∼11-year periodicities; however, they differ significantly on the multidecadal time scale. The wavelet spectra of CH areas in the Southern hemisphere, unlike those in the Northern one, reveal persistent periodicities of ∼30-35 years on the studied time interval. Similar periodicities of ∼30-35 years are observed in annual occurrences of GC magnetic storms which are caused by high-speed streams of solar wind from coronal holes. The results of cross wavelet analysis of annual occurrence frequencies of GC magnetic storms and areas of coronal holes revealed common periodicities ∼11, ∼35 and ∼60 years which confirmed a close link of these storms with the evolution of large-scale magnetic fields on the Sun.

scholarly journals Gravity tests with INPOP planetary ephemerides

2009 ◽  
Vol 5 (S261) ◽  
pp. 159-169 ◽  
Author(s):  
A. Fienga ◽  
J. Laskar ◽  
P. Kuchynka ◽  
C. Leponcin-Lafitte ◽  
H. Manche ◽  
...  
Keyword(s):  
Solar System ◽  
The Sun ◽  
Constant Acceleration ◽  
Pioneer Anomaly

AbstractWe present here several gravity tests made with the latest INPOP08 planetary ephemerides. We first propose two methods to estimate the PPN parameter β and its correlated value, the Sun J2, and we discuss the correlation between the Sun J2 and the mass of the asteroid ring. We estimate a possible advance in the planet perihelia. We also show that no constant acceleration larger than 1/4 of the Pioneer anomaly is compatible with the observed motion of the planets in our Solar System.

Precise positions of Triton in 2010–2014 based on Gaia-DR2

2021 ◽  
Author(s):  
Huiyan Zhang ◽  
Yong Yu ◽  
Dan Yan ◽  
Kai Tang ◽  
Rongchuan Qiao
Keyword(s):  
Solar System ◽  
Physical Properties ◽  
Orbital Evolution ◽  
Astronomical Observatory ◽  
Standard Errors ◽  
Origin And Evolution ◽  
Important Target ◽  
Long Time ◽  
Gaia Dr2

Abstract With unique orbital and physical characteristics, Triton is a very important target since it may contain information of the origin and evolution of the solar system. Besides space explorations, ground-based observations over long time also play key role on research of Triton. High-precision positions of Triton obtained from ground telescopes are of great significance for studying its orbital evolution and inverting the physical properties of Neptune. As a long-term observational target, Triton has been observed by the 1.56 m telescope of Shanghai Astronomical Observatory since 1996. In this paper, based on our AAPPDI software and with Gaia DR2 as the reference catalogue, 604 positions of Triton during 2010-2014 are calculated, with standard errors of $19mas-88mas$. A comparison between our results and the ephemeris (DE431+nep096) is also given.

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