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.

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.

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 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.

scholarly journals SEARCH FOR A STANDARD EXPLANATION OF THE PIONEER ANOMALY

2002 ◽  
Vol 17 (14) ◽  
pp. 875-885 ◽  
Author(s):  
JOHN D. ANDERSON ◽  
EUNICE L. LAU ◽  
SLAVA G. TURYSHEV ◽  
PHILIP A. LAING ◽  
MICHAEL MARTIN NIETO
Keyword(s):  
Doppler Frequency ◽  
Frequency Drift ◽  
The Sun ◽  
Physical Origin ◽  
Thermal Models ◽  
Pioneer Anomaly ◽  
Pioneer 10

The data from Pioneer 10 and 11 shows an anomalous, constant, Doppler frequency drift that can be interpreted as an acceleration directed towards the Sun of aP = (8.74 ± 1.33) × 10-8 cm / s 2. Although one can consider a new physical origin for the anomaly, one must first investigate the contributions of the prime candidates, which are systematics generated on board. Here we expand upon previous analyses of thermal systematics. We demonstrate that thermal models put forth so far are not supported by the analyzed data. Possible ways to further investigate the nature of the anomaly are proposed.

scholarly journals Testing alternate gravitational theories

2009 ◽  
Vol 5 (S261) ◽  
pp. 179-182 ◽  
Author(s):  
E. M. Standish
Keyword(s):  
Equations Of Motion ◽  
The Sun ◽  
Constant Acceleration ◽  
Gravitational Theories ◽  
Pioneer Anomaly ◽  
The Future ◽  
Gravitational Equations

AbstractThe planetary ephemerides are used to examine different suggested forms of the gravitational equations of motion which could possibly cause the observed Pioneer Anomaly. It is shown that most of the forms would be unacceptable, including that generally assumed – a constant acceleration directed toward the Sun. The tests show that three other forms could not exist within 10 au's of the Sun. Only one suggested form would be compatible with the Pioneer Anomaly affecting Saturn or any other more inward planet. Additional planetary observations in the future may possibly eliminate this form also.

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 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.

PIONEER ANOMALY? GRAVITATIONAL PULL DUE TO THE KUIPER BELT

2006 ◽  
Vol 15 (04) ◽  
pp. 533-544 ◽  
Author(s):  
JOSÉ A. DE DIEGO ◽  
DARÍO NÚÑEZ ◽  
JESÚS ZAVALA
Keyword(s):  
Density Distribution ◽  
Kuiper Belt ◽  
Blue Shift ◽  
The Sun ◽  
Matter Distribution ◽  
Constant Acceleration ◽  
Pioneer Anomaly ◽  
Gravitational Influence ◽  
Gravitational Pull

In this work, we study the gravitational influence of the material extending from Uranus orbit to the Kuiper belt and beyond on objects moving within these regions. We conclude that a density distribution given by [Formula: see text] generates a constant acceleration towards the Sun on those objects, which, with the proper amount of mass, accounts for the blue shift detected on the Pioneers space crafts. We also discuss the effect of this gravitational pull on Neptune, and comment on the possible origin of such a matter distribution.

PRESENT STATUS OF THE STUDY OF THE ANOMALOUS ACCELERATION OF THE PIONEER 10/11 SPACECRAFT

2005 ◽  
Vol 20 (11) ◽  
pp. 2304-2308 ◽  
Author(s):  
J. P. MBELEK
Keyword(s):  
Weak Field ◽  
Low Velocity ◽  
Pioneer Anomaly ◽  
Real Change ◽  
Local Manifestation ◽  
Anomalous Acceleration ◽  
Expansion Of The Universe ◽  
The Universe ◽  
Pioneer 10 ◽  
Radiometric Data

Results from an almost twenty years study of radiometric data from Pioneer 10/11, Galileo and Ulysses spacecraft indicate an anomalous time depending blueshift1, 2 which bares hardly prosaic explanations. Local manifestation of the expansion of the universe or new force terms are not favored either by the observational data. So, we explore the possibility that the reported anomaly, referred to as the "Pioneer anomaly", does not result from a real change in velocity. It turns out that the main Pioneer anomaly may be looked at as a new validation of general relativity (GR) in the weak field and low velocity limit on account of the "machian" behavior of quintessence like dark energy.

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
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