ASTERIA (spacecraft)

Short description: CubeSat testing technologies for the detection of exoplanets

ASTERIA (Arcsecond Space Telescope Enabling Research in Astrophysics)

ASTERIA during testing. It is a 6U CubeSat space telescope for the detection of exoplanets

Names| ExoplanetSat (2011)
Mission type| Technology demonstrator
Operator| NASA
COSPAR ID| 1998-067NH
SATCAT no.| 43020
Website| www.jpl.nasa.gov/cubesat/missions/asteria.php
Mission duration| Nominal: 90 days
Extension: up to 1 year
Achieved: 2 years, 15 days
Spacecraft properties
Spacecraft| ASTERIA
Bus| 6U CubeSat
Manufacturer| JPL and MIT
Launch mass| 12 kg (26 lb)
Dimensions| 10 cm × 20 cm × 30 cm (0.33 ft × 0.66 ft × 0.98 ft)
Start of mission
Launch date| August 14, 2017 (2017-08-14), 16:31 UTC
deployed: 20 November 2017
Rocket| Falcon-9
Launch site| Kennedy LC-39A
Contractor| SpaceX
End of mission
Last contact| 5 December 2019
Decay date| 24 April 2020
Orbital parameters
Reference system| Geocentric
Regime| Low Earth
Perigee altitude| 402.7 kilometres (250.2 miles)
Apogee altitude| 406.7 kilometres (252.7 miles)
Inclination| 51.6°
Period| 92.5 minutes
Main
Wavelengths| visible spectrum: 390–700 nm

ASTERIA (Arcsecond Space Telescope Enabling Research in Astrophysics) was a miniaturized space telescope technology demonstration and opportunistic science mission to conduct astrophysical measurements using a CubeSat. It was designed in collaboration between the Massachusetts Institute of Technology (MIT) and NASA's Jet Propulsion Laboratory. ASTERIA was the first JPL-built CubeSat to have been successfully operated in space. Originally envisioned as a project for training early career scientists and engineers, ASTERIA's technical goal was to achieve arcsecond-level line-of-sight pointing error and highly stable focal plane temperature control. These technologies are important for precision photometry, i.e., the measurement of stellar brightness over time. Precision photometry, in turn, provides a way to study stellar activity, transiting exoplanets, and other astrophysical phenomena.

ASTERIA was launched on 14 August 2017 and deployed into low Earth orbit from the International Space Station on 20 November 2017.[1] The primary mission lasted 90 days, but the satellite continued operations for 745 days through three extended missions until last successful communications were made on December 5, 2019.[2] The satellite decayed 24 April 2020. The Principal Investigator was Canadian-American astronomer and planetary scientist Sara Seager, from the Massachusetts Institute of Technology.[3]

## Contents

* 1 Overview
* 2 Launch
* 3 Design
* 3.1 Scientific payload
* 4 References

## Overview

The Arcsecond Space Telescope Enabling Research in Astrophysics (ASTERIA) was a six-unit (6U) CubeSat space telescope deployed from the International Space Station (ISS) with the goal of testing new technologies for the detection of exoplanets using the transit method.[1][4][5] The program was funded at JPL through the Phaeton Program for training early career employees.[1] Its target mission lasted for 90 days,[1] after which it was extended until the loss of contact with the spacecraft.[6][2]

ASTERIA's capabilities enabled precision photometry to be performed on an opportunistic basis to study stellar activity, transiting exoplanets, and other astrophysical phenomena. The technological objectives of the mission were "to achieve arcsecond-level line of sight pointing error, and highly stable focal plane temperature control for precision photometry" as a way to detect transiting exoplanets, and characterize their host stars.[4] The pointing stability was demonstrated over 20-minute observations. Pointing repeatability would be determined over a minimum of five observations over eight or more days, with the target star being returned to the same position on the focal plane by adjusting the spacecraft orientation and focal plane position.[4]

This mission may serve as a pathfinder for a fleet of low-cost space telescopes observing multiple targets at once to refine long-term mission goals by identifying new objects for other telescopes to observe. The miniaturization of a photometric detection system into a CubeSat could enable a constellation of multiple orbiting observatories for a continuous study of the brightest Sun-like stars which is not possible by conventional space observatories given their cost.[7] Having one or more CubeSats pointed at a target star for extended duration could reveal long-transiting exoplanets.[7] This mission also provided additional information in the design of future space telescopes.[4]

## Launch

ASTERIA was launched on board a SpaceX Falcon-9 rocket (mission SpaceX CRS-12[5]) on 14 August 2017 and it was deployed to low Earth orbit from the International Space Station in November 2017.[1] A crew member in the ISS transferred the satellite from the cargo vehicle to the Japanese Experiment Module (JEM) airlock for transfer outside the ISS.

## Design

lens

The ASTERIA concept was a follow-on to the proposed 3U CubeSat mission called ExoplanetSat that was designed in the early 2010s.[4][8] The ASTERIA telescope is a 6U CubeSat measuring 10 × 20 × 30 cm, and has a mass of 12 kg (26 lb).[1][7] Power was supplied by deployable fixed solar panels and rechargeable batteries.[5]

Commercial reaction wheels provided coarse orientation (attitude control), while fine pointing control was achieved by tracking a set of guide stars on the active pixel sensor (CMOS) and moving the piezoelectric positioning stage to compensate for residual pointing errors.[1] The goal was to maintain the target star image to within a fraction of a detector pixel over long durations,[4] with a pointing accuracy better than 60 arcsecond, and optimally as precise as 5 arcsecond[9] over a period of 20 minutes. The gain of each pixel was temperature sensitive, so the second objective of ASTERIA was to demonstrate milliKelvin-level temperature stability of the imaging detector.[4]

ASTERIA demonstrated the ability to collect photometric data, and process photometric light curves from a CubeSat. Secondary applications included measuring stellar rotation periods, characterizing stellar activity of exoplanet hosts, and supporting ground-based radial velocity measurements with simultaneous photometry. After the success of its 90-day planned mission, ASTERIA's extended mission targeted bright stars (luminosity Vmag < 8) with known low-mass planets discovered by the radial velocity method, that are not yet known to transit.[4]

### Scientific payload

The telescope payload consisted of a lens and baffle assembly, a CMOS imager, and a two-axis piezoelectric positioning stage on which the focal plane was mounted.[4] The optics section was composed of an f/1.4 85 mm Zeiss lens with a 28.6-degree field of view and six elements, focusing an image 43 mm in diameter onto the focal plane. The focal plane array housed two active detector areas – one larger CMOS detector that fulfilled the science function, and a smaller CMOS sensor to acted as a rapid-cadence star camera to provide orientation data to the attitude control system.[6]

In April 2018 NASA's JPL reported that ASTERIA "has accomplished all of its primary mission objectives, demonstrating that the miniaturized technologies on board can operate in space as expected."[10]

## References

1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 Arcsecond Space Telescope Enabling Research in Astrophysics (ASTERIA). Jon Nelson, Jet Propulsion Laboratory, NASA.
2. ↑ 2.0 2.1 "Tiny Satellite for Studying Distant Planets Goes Quiet". JPL. https://www.jpl.nasa.gov/news/news.php?feature=7568.
3. ↑ Seager, Sara (Jan/Feb. 2021). "My satellite would fit in a small suitcase. But it could help us find other worlds" (excerpt from book The Smallest Lights in the Universe (2020).) MIT News, pp. 12-17. Retrieved 20 May 2023.
4. ↑ 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 ISS - ASTERIA. Victor M. Escobedo Jr. NASA News, October 2017.
5. ↑ 5.0 5.1 5.2 ASTERIA. Gunter Krebs, Gunter's Space Page. 14 August 2017.
6. ↑ 6.0 6.1 ASTERIA Satellite. Spaceflight 101 18 November 2017.
7. ↑ 7.0 7.1 7.2 Sara Seager- Exoplanet Space Missions . 2017.
8. ↑ ExoplanetSat: A Nanosatellite Space Telescope for Detecting Transiting Exoplanets (PDF). Matthew W. Smith, Sara Seager, Christopher M. Pong, SungyungLim, Matthew W. Knutson, Timothy C. Henderson, Joel N. Villaseñor, Nicholas K. Borer, David W. Miller, Shawn Murphy. Massachusetts Institute of Technology. CubeSat Developers' Workshop. April 20–22, 2011. San Luis Obispo, CA
9. ↑ Characterization of CubeSat Reaction Wheel Assemblies (PDF). Joel Shields, Christopher Pong, Kevin Lo, Laura Jones, Swati Mohan, Chava Marom, Ian McKinley, William Wilson and Luis Andrade. Journal of Small Satellites, Vol. 6, No. 1, pp. 565–580. 2017.
10. ↑ Astrophysics CubeSat Demonstrates Big Potential in a Small Package. Jet Propulsion Laboratory, NASA. 12 April 2018.

* v
* t
* e

Space observatories

Operating|

* AGILE (since 2007)
* AMS-02 (since 2011)
* Aoi (since 2018)
* ASTERIA (since 2017)
* Astrosat (since 2015)
* BRITE constellation (since 2013)
* CALET (since 2015)
* Chandra (AXAF) (since 1999)
* DAMPE (since 2015)
* Fermi (since 2008)
* Gaia (since 2013)
* HXMT (Insight) (since 2017)
* Hinode (Solar-B) (since 2006)
* HiRISE (since 2005)
* Hisaki (SPRINT-A) (since 2013)
* Hubble (since 1990)
* INTEGRAL (since 2002)
* IBEX (since 2008)
* IRIS (since 2013)
* ISS-CREAM (since 2017)
* MAXI (since 2009)
* Mikhailo Lomonosov (since 2016)
* Mini-EUSO (since 2019)
* NCLE (since 2018)
* NEOSSat (since 2013)
* NICER (since 2017)
* NuSTAR (since 2012)
* Odin (since 2001)
* SDO (since 2010)
* SOHO (since 1995)
* SOLAR (since 2008)
* Spektr-RG (since 2019)
* Spitzer (since 2003)
* STEREO (since 2006)
* Swift (since 2004)
* TESS (since 2018)
* WISE (since 2009)
* XMM-Newton (since 1999)

Planned|

* CHEOPS (2019)
* iWF-MAXI (2019)
* Astro-1 Telescope (2020)
* ILO-1 (2020)
* LUCI (2020)
* Nano-JASMINE (2020)
* ORBIS (2020)
* Solar Orbiter (SolO) (2020)
* IXPE (2021)
* James Webb (JWST) (2021)
* LORD (2021)
* SVOM (2021)
* XPoSat (2021)
* Euclid (2022)
* Space Solar Telescope (2022)
* XRISM (2022)
* Xuntian (2022)
* K-EUSO (2023)
* Solar-C (2023)
* SPHEREx (2023)
* Small-JASMINE (2024)
* Near-Earth Object Surveillance Mission (2025+)
* Spektr-UV (2025)
* WFIRST (2025+)
* PLATO (2026)
* LiteBIRD (2027)
* ARIEL (2028)
* Spektr-M (2030+)
* ATHENA (2031)
* LISA (2034)

Proposed|

* Arcus
* AstroSat-2
* EXCEDE
* Fresnel Imager
* FOCAL
* HabEx
* Hibari
* Hypertelescope
* JEM-EUSO
* LUVOIR
* ATLAST
* HDST
* Lynx
* Nautilus Deep Space Observatory
* New Worlds Mission
* NRO donation to NASA
* OST
* PhoENiX
* Solar-D
* SPICA
* THEIA
* THESEUS

Retired|

* Akari (Astro-F) (2006–2011)
* ALEXIS (1993–2005)
* Alouette 1 (1962–1972)
* Ariel 1 (1962, 1964)
* Ariel 2 (1964)
* Ariel 3 (1967–1969)
* Ariel 4 (1971–1972)
* Ariel 5 (1974–1980)
* Ariel 6 (1979–1982)
* ATM (1973–1974)
* ASCA (Astro-D) (1993–2000)
* Astro-1 (1990)
* BBXRT
* HUT
* Astro-2 (HUT) (1995)
* Astron (1983–1989)
* ANS (1974–1976)
* BeppoSAX (1996–2003)
* CHIPSat (2003–2008)
* Compton (CGRO) (1991–2000)
* CoRoT (2006–2013)
* Cos-B (1975–1982)
* COBE (1989–1993)
* DXS (1993)
* EPOCh (2008)
* EPOXI (2010)
* Explorer 11 (1961)
* EXOSAT (1983–1986)
* EUVE (1992–2001)
* FUSE (1999–2007)
* Kvant-1 (1987–2001)
* GALEX (2003–2013)
* Gamma (1990–1992)
* Ginga (Astro-C) (1987–1991)
* Granat (1989–1998)
* Hakucho (CORSA-b) (1979–1985)
* HALCA (MUSES-B) (1997–2005)
* HEAO-1 (1977–1979)
* Herschel (2009–2013)
* Hinotori (Astro-A) (1981–1991)
* HEAO-2 (Einstein Obs.) (1978–1982)
* HEAO-3 (1979–1981)
* HETE-2 (2000–2008)
* Hipparcos (1989–1993)
* IUE (1978–1996)
* IRAS (1983)
* IRTS (1995–1996)
* ISO (1996–1998)
* IXAE (1996–2004)
* Kepler (2009–2018)
* Kristall (1990–2001)
* LEGRI (1997–2002)
* LISA Pathfinder (2015–2017)
* MOST (2003–2019)
* MSX (1996–1997)
* OAO-2 (1968–1973)
* OAO-3 (Copernicus) (1972–1981)
* Orbiting Solar Observatory
* OSO 1
* OSO 2/OSO B
* OSO 3
* OSO 4
* OSO 5
* OSO 6
* OSO 7
* OSO 8
* Orion 1 (1971)
* Orion 2 (1973)
* PAMELA (2006–2016)
* PicSat (2018)
* Planck (2009–2013)
* RELIKT-1 (1983–1984)
* R/HESSI (2002–2018)
* ROSAT (1990–1999)
* RXTE (1995–2012)
* SAMPEX (1992–2004)
* SAS-B (1972–1973)
* SAS-C (1975–1979)
* Solwind (1979–1985)
* Spektr-R (2011–2019)
* Suzaku (Astro-EII) (2005–2015)
* Taiyo (SRATS) (1975–1980)
* Tenma (Astro-B) (1983–1985)
* Uhuru (1970–1973)
* Vanguard 3 (1959)
* WMAP (2001–2010)
* Yokoh (Solar-A) (1991–2001)

Hibernating
(Mission completed)|

* SWAS (1998–2005)
* TRACE (1998–2010)

Lost|

* OAO-1 (1966)
* OAO-B (1970)
* CORSA (1976)
* OSO C (1965)
* ABRIXAS (1999)
* HETE-1 (1996)
* WIRE (1999)
* Astro-E (2000)
* Tsubame (2014–2015)
* Hitomi (Astro-H) (2016)

Cancelled|

* AOSO
* Astro-G
* Constellation-X
* Darwin
* Destiny
* EChO
* Eddington
* FAME
* FINESSE
* GEMS
* HOP
* IXO
* JDEM
* LOFT
* OSO J
* OSO K
* Sentinel
* SIM & SIMlite
* SNAP
* SPOrt
* TAUVEX
* TPF
* XEUS
* XIPE

See also|

* Great Observatories program
* List of space telescopes
* List of proposed space observatories
* List of X-ray space telescopes

* Category

* v
* t
* e

Exoplanet search projects

* Exoplanetology
* Exoplanet

Ground-based|

* AAPS
* APF
* CORALIE
* EAPSNet
* ELODIE
* EPICS
* ESPRESSO
* FINDS Exo-Earths
* Geneva
* HARPS
* HARPS-N
* GPI
* HATNet
* HEK
* HiCIAO
* HIRES
* KELT
* LCES
* Magellan
* MARVELS
* MASCARA
* MEarth
* MicroFUN
* MINERVA
* Australis
* MOA
* N2K
* NGTS
* NESSI
* OGLE
* OPSP
* PlanetPol
* Project 1640
* PARAS
* SEEDS
* SETI
* SOPHIE
* SPECULOOS
* SPHERE
* SuperWASP
* Systemic
* TrES
* XO Telescope
* ZIMPOL/CHEOPS

Space missions|

| Past|

* MOST (2003–2019)
* SWEEPS using HST (2006)
* CoRoT (2006–2013)
* EPOXI using Deep Impact (2008–2013)
* Kepler (2009–2018)
* detected exoplanets

|

Current|

* Gaia (2013–present)
* ASTERIA (2017–present)
* TESS (2018–present)

Planned|

* CHEOPS (2019)
* James Webb Space Telescope (2021)
* PLATO (2026)
* ARIEL (2028)
* WFIRST (mid-2020s)

Proposed|

* ATLAST
* EXCEDE
* HabEx
* HDST
* LUVOIR
* Nautilus Deep Space Observatory
* New Worlds Mission
* OST
* PEGASE

Cancelled|

* Darwin
* EChO
* Eddington
* Space Interferometry Mission
* Terrestrial Planet Finder

* Detection methods
* Discoveries of exoplanets
* Lists of exoplanets
* nearest

* v
* t
* e

Exoplanetology

* Planet
* Definition
* IAU
* Planetary science

Main topics|

* Exoplanet
* Methods of detecting exoplanets
* Planetary system

Sizes
and types|

| Terrestrial|

* Carbon planet
* Coreless planet
* Desert planet
* Dwarf planet
* Ice planet
* Iron planet
* Lava planet
* Mega-Earth
* Ocean planet
* Sub-Earth
* Super-Earth

|

Gaseous|

* Eccentric Jupiter
* Gas dwarf
* Helium planet
* Hot Jupiter
* Hot Neptune
* Ice giant
* Mini-Neptune
* Super-Neptune
* Super-Jupiter

Other types|

* Brown dwarf
* Chthonian planet
* Circumbinary planet
* Disrupted planet
* Double planet
* Eyeball planet
* Mesoplanet
* Planemo
* Planet/Brown dwarf boundary
* Planetesimal
* Protoplanet
* Pulsar planet
* Sub-brown dwarf
* Ultra-cool dwarf
* Ultra-short period planets (USP)

Formation
and evolution|

* Accretion
* Accretion disk
* Asteroid belt
* Circumplanetary disk
* Circumstellar disc
* Circumstellar envelope
* Cosmic dust
* Debris disk
* Detached object
* Disrupted planet
* Excretion disk
* Exoplanetary Circumstellar Environments and Disk Explorer
* Exozodiacal dust
* Extraterrestrial materials
* Extraterrestrial sample curation
* Giant-impact hypothesis
* Gravitational collapse
* Hills cloud
* Interplanetary dust cloud
* Interplanetary medium
* Interplanetary space
* Interstellar cloud
* Interstellar dust
* Interstellar medium
* Interstellar space
* Kuiper belt
* List of interstellar and circumstellar molecules
* Merging stars
* Molecular cloud
* Nebular hypothesis
* Oort cloud
* Outer space
* Planetary migration
* Planetary system
* Planetesimal
* Planet formation
* Protoplanetary disk
* Ring system
* Rubble pile
* Sample-return mission
* Scattered disc
* Star formation

Systems|

* Exocomet
* Exomoon
* Interstellar comet
* Mean-motion resonances
* Retrograde planet
* Rogue planet
* Tidally detached exomoon
* Titius–Bode laws
* Trojan planet

Host stars|

* A
* B
* Binary star
* Brown dwarfs
* Extragalactic planet
* F/Yellow-white dwarfs
* G/Yellow dwarfs
* Herbig Ae/Be
* K/Orange dwarfs
* M/Red dwarfs
* Planets in globular clusters
* Pulsar
* Red giant
* Subdwarf B
* Subgiant
* T Tauri
* White dwarfs
* Yellow giants

Detection|

* Astrometry
* Direct imaging
* list
* Microlensing
* list
* Polarimetry
* Pulsar timing
* list
* Radial velocity
* list
* Transit method
* list
* Transit-timing variation

Habitability|

* Astrobiology
* Circumstellar habitable zone
* Earth analog
* Extraterrestrial liquid water
* Habitability of natural satellites
* Superhabitable planet

Catalogues|

* Catalog of Nearby Habitable Systems
* Exoplanet Data Explorer
* Extrasolar Planets Encyclopaedia
* NASA Exoplanet Archive
* NASA Star and Exoplanet Database

Lists|

* Exoplanetary systems
* Host stars
* Multiplanetary systems
* Stars with proplyds
* Exoplanets
* Lists of exoplanets
* Discoveries
* Extremes
* Firsts
* Nearest
* Largest
* Most massive
* Terrestrial candidates
* Kepler
* Potentially habitable
* Discovered exoplanets by year
* before 2000
* 2000–2009
* 2010
* 2011
* 2012
* 2013
* 2014
* 2015
* 2016
* 2017
* 2018
* 2019

Other|

* Carl Sagan Institute
* Exoplanet phase curves
* Nexus for Exoplanet System Science
* Planets in science fiction
* Sudarsky's gas giant classification

* Discoveries of exoplanets
* Search projects

* v
* t
* e

2017 in space

* « 2016

2018 »

Impact events|

* Bolides in 2017
* 2017 China bolide

Selected NEOs|

* Asteroid close approaches
* 2012 TC4
* 2013 SY99 (announced)
* 2017 AG13
* 2014 JO25
* 2016 WF9
* 2017 BQ6
* 2017 BS5
* 2017 SX17
* 3122 Florence
* C/2015 ER61 (PANSTARRS)

Exoplanets |

* HATS-36b
* KELT-18b
* Kepler-80g
* Kepler-90i
* LHS 1140 b
* Luyten b
* NGTS-1b
* OGLE-2016-BLG-1190Lb
* OGLE-2016-BLG-1195Lb
* Ross 128 b
* TRAPPIST-1e
* TRAPPIST-1f
* TRAPPIST-1g
* TRAPPIST-1h
* WASP-107b

Discoveries|

* GW170104
* GW170608
* GW170814
* GW170817
* Ring of Haumea
* IGR J17329-2731
* ʻOumuamua
* RZ Piscium
* ULAS J1342+0928
* Saraswati Supercluster

Space exploration|

* Cassini retirement

* Category:2016 in space — Category:2017 in space — Category:2018 in space

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