Fine guidance sensors aboard the Hubble Space Telescope: the scientific capabilities of these interferometers

Nelan, Edmund; Lupie, O. L.; McArthur, B.; Benedict, G. F.; Franz, O. G.; Wasserman, L. H.; Abramowicz-Reed, Linda; Makidon, Russell B.; Nagel, Lauretta

doi:10.1117/12.317121

Cited by 13 publications

(6 citation statements)

References 2 publications

(3 reference statements)

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“…The FGS astrometer offers many observation capabilities (Nelan et al 1998) that have already been used in the past for binary stars (Franz et al 1991(Franz et al , 1992Bernacca et al 1993Bernacca et al , 1995Schneider et al 1998), extended Miras (Lattanzi et al 1994(Lattanzi et al , 1997 and AGN (Hook et al 2000). For such objects the fringe pattern or S -curve changes with respect to that of a point-like source.…”

Section: Effects Of Size and Duplicitymentioning

confidence: 99%

Asteroids observations with the Hubble Space Telescope FGS

Hestroffer¹,

Tanga²,

Cellino³

et al. 2002

A&A

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Abstract. Five main belt asteroids and one Trojan -selected mainly on the basis of their possible binary nature as deduced from light curve morphology -have been observed with the Fine Guidance Sensors (FGS#3 and FGSR#1) of the Hubble Space Telescope (HST). In this first paper we present the selection and observation strategy, data reduction and analysis. A careful analysis of the precision for derived parameters is also given. The HST/FGS proves to be valuable in determining asteroid sizes, shapes and spin axis orientations, and also to identify nearly-contact binary systems.

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Section: Effects Of Size and Duplicitymentioning

confidence: 99%

Asteroids observations with the Hubble Space Telescope FGS

Hestroffer¹,

Tanga²,

Cellino³

et al. 2002

A&A

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“…Each FGS consists of two moveable Koester prism interferometers with a 60 arcmin 2 field of view to search and track stars and a 5.0 arcsec 2 instantaneous field of view to accurately locate stars. The two sets of FGs work together to determine the pointing position [5]. First one FGS searches for and locks on one guide star, then another FGS searches for and locks on the other.…”

Section: Hubble Missionmentioning

confidence: 99%

Fine Guidance Sensor Attitude Determination System of the High-Accuracy Satellite Mission

Liu

et al. 2022

Springer Proceedings in Physics

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Fine guidance sensor is becoming a norm for future satellite missions. Missions requiring attitude stability better than sub-arcsec to milli-arcsec employ satellite specific Fine Guidance Sensor (FGS), which is an interferential instrument with complex research, as it forms extended field of view that focuses the optic signal from the telescope primary dish to provide high pointing stability information to the satellite for control. High precision and high stability pointing are hot issues in attitude determination research both in the past and now. First, this work introduces the FGS of foreign astronomical telescopes mission (Hubble and Kepler), cameras of TESS mission, and the FGS of the domestic mission astronomical telescope mission (SVOM). Secondly, the attitude estimation algorithms of SVOM and foreign highprecision satellites are compared. Finally, a closed-loop test of the SVOM system achieves a stability of 0.8 arcsec /100 s.

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“…The Fine Guidance Sensors (FGS) aboard the Hubble Space Telescope (HST) are optical white-light shearing interferometers (Nelan et al, 1998) that combine the light from distinct apertures of the HST primary mirror and have been used to measure the size and basic shape properties of asteroids (Hestroffer et al, 2002;Tanga et al, 2003). HST/FGS data have clearly demonstrated the bi-lobed nature of some bodies such as (216) Kleopatra (Tanga et al, 2001) and ( 624) Hektor (Tanga et al, 2003), but were not able to detect the presence of the little moons orbiting these asteroids (Descamps et al, 2011;Marchis et al, 2014), due to the large magnitude difference between the asteroids and their respective moons.…”

Section: Interferometrymentioning

confidence: 99%

Asteroid Models from Multiple Data Sources

Durech,

Carry,

Delbo

et al. 2015

Preprint

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In the past decade, hundreds of asteroid shape models have been derived using the lightcurve inversion method. At the same time, a new framework of 3-D shape modeling based on the combined analysis of widely different data sources such as optical lightcurves, disk-resolved images, stellar occultation timings, mid-infrared thermal radiometry, optical interferometry, and radar delay-Doppler data, has been developed. This multi-data approach allows the determination of most of the physical and surface properties of asteroids in a single, coherent inversion, with spectacular results. We review the main results of asteroid lightcurve inversion and also recent advances in multi-data modeling. We show that models based on remote sensing data were confirmed by spacecraft encounters with asteroids, and we discuss how the multiplication of highly detailed 3-D models will help to refine our general knowledge of the asteroid population. The physical and surface properties of asteroids, i.e., their spin, 3-D shape, density, thermal inertia, surface roughness, are among the least known of all asteroid properties. Apart for the albedo and diameter, we have access to the whole picture for only a few hundreds of asteroids. These quantities are nevertheless very important to understand as they affect the non-gravitational Yarkovsky effect responsible for meteorite delivery to Earth, or the bulk composition and internal structure of asteroids.

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Fine guidance sensors aboard the Hubble Space Telescope: the scientific capabilities of these interferometers

Cited by 13 publications

References 2 publications

Asteroids observations with the Hubble Space Telescope FGS

Asteroids observations with the Hubble Space Telescope FGS

Fine Guidance Sensor Attitude Determination System of the High-Accuracy Satellite Mission

Asteroid Models from Multiple Data Sources

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