#teamradar — Public Fediverse posts

#TeamRadar

QT Nature Astronomy @natastron.nature.com‬
2026 July 10

Non-gravitational acceleration indicative of cometary activity of near-Earth object

https://www.nature.com/articles/s41550-026-02913-7

https://bsky.app/profile/natastron.nature.com/post/3mqcj2kwexh2e

More #TeamRadar at #ACM2026:

Shapes of the equal-mass binary 2017 YE5 (led by Kris Laferriere).
Survey of the shapes of contact binary NEAs (led by Richard Cannon).
Binary NEA orbit fits (led by Aaron Deleon).
And observations of 2025 FA22 from Canberra (led by Shinji Horiuchi).

#TeamRadar at #ACM2026:

Shape models of near-Earth asteroids Ganymed (led by Allison McGraw), 1990 UQ (led by Xavier Inosencioa), 1999 FN53 (led by Flavia Rommel), 1994 AW1 (led by Marin Ferrais), 3200 Phaethon (led by Sean Marshall), and 1998 JM8 (led by Marina Brozovic).

#TeamRadar at #ACM2026:

Shape models of near-Earth asteroids Ganymed (led by Allison McGraw), 1990 UQ (led by Xavier Inosencioa), 1999 FN53 (led by Flavia Rommel), 1994 AW1 (led by Marin Ferrais), 3200 Phaethon (led by Sean Marshall), and 1999 JM8 (led by Marina Brozovic).

#TeamRadar is also observing this one: https://echo.jpl.nasa.gov/asteroids/1997nc1.2026.goldstone.planning.html

QT ESA Operations @operations.esa.int
2026 June 24
‬
Asteroid (152637) 1997 NC1, as monitored by ESA's Planetary Defence team, makes a close approach to Earth this Saturday that could be visible to small telescopes
https://esa.int/ESA_Multimedia/Images/2026/06/Close_approach_of_asteroid_152637_1997_NC1

https://bsky.app/profile/operations.esa.int/post/3mozelq3m2k2o

#TeamRadar at the National Radio Astronomy Observatory is hiring someone to do the on-site work at the Green Bank Telescope: https://jobs.dayforcehcm.com/en-US/aui/CANDIDATEPORTAL/jobs/1313 .

This requires living in Green Bank, West Virginia, or lots of travel through the mountains.

#TeamRadar at the National Radio Astronomy Observatory is hiring someone to do the on-site work at the Green Bank Telescope: https://jobs.dayforcehcm.com/en-US/aui/CANDIDATEPORTAL/jobs/1313 .

This requires living in Green Bank, West Virginia, or lots of travel through the mountains.

Today on the #arXiv:

Nolan et al. 2026, "Planetary Radar at the Arecibo Observatory" - https://arxiv.org/abs/2604.00332

@mikeynolan , @lynncarter, and @PlanetTreky review everything that was done by #TeamRadar at Arecibo.

Today on the #arXiv:

Cannon et al. 2026, "The shape and spin state of (275677) 2000 RS11 from ground-based radar and optical observations" - https://arxiv.org/abs/2603.16703

Led by Richard Cannon, working with Agata Rożek and building on work Kaley Brauer did with me.

#TeamRadar

These results for Nereus are consistent with those from #TeamRadar in 2009 (11º pole direction offset with uncertainties of ±10º).

https://echo.jpl.nasa.gov/asteroids/4660_Nereus/brozovic.etal.2009.nereus.pdf

RE: https://mastodon.online/@elizabethtasker/115790794830667822

#TeamRadar approved.

As well as it being unavailable for spacecraft communications; #TeamRadar observations with DSS-14 have been canceled since September: https://echo.jpl.nasa.gov/asteroids/goldstone_asteroid_schedule.html

QT SpaceNews @spacenewsinc.bsky.social‬
2025 November 11

Key antenna in NASA’s Deep Space Network damaged

One of the largest antennas in NASA’s Deep Space Network was damaged in September and may be out of service for an extended period, further straining the system.
https://spacenews.com/key-antenna-in-nasas-deep-space-network-damaged/
https://bsky.app/profile/spacenewsinc.bsky.social/post/3m5e7ogiros2z

As well as it being unavailable for spacecraft communications; #TeamRadar observations with DSS-14 have been canceled since September: https://echo.jpl.nasa.gov/asteroids/goldstone_asteroid_schedule.html

QT SpaceNews @spacenewsinc.bsky.social‬
2025 November 11

Key antenna in NASA’s Deep Space Network damaged

One of the largest antennas in NASA’s Deep Space Network was damaged in September and may be out of service for an extended period, further straining the system.
https://spacenews.com/key-antenna-in-nasas-deep-space-network-damaged/
https://bsky.app/profile/spacenewsinc.bsky.social/post/3m5e7ogiros2z

RE: https://mastodon.social/@mcnees/115463782589358330

#TeamRadar

RE: https://mastodon.social/@mcnees/115463782589358330

#TeamRadar

#TeamRadar

Lazio et al. 2025, "The Next-Generation Ground-Based Planetary Radar" - https://www.kiss.caltech.edu/final_reports/NextGeneration-PlanetaryRadar-final%202025-09-19.pdf

#TeamRadar

Lazio et al. 2025, "The Next-Generation Ground-Based Planetary Radar" - https://www.kiss.caltech.edu/final_reports/NextGeneration-PlanetaryRadar-final%202025-09-19.pdf

Emerson Wittaker: talking about near earth asteroid binary 1999 KW4: Moshup 1.5km and Squannit 0.5km, mutual orbit in 17 hours. Measured by #TeamRadar from Arecibo (😭)

Evolution of system depends on YORP effect, relative spins of bodies, and shapes.

Doing shape-model libration simulations now.

#SolarSystemInContext

Emerson Wittaker: talking about near earth asteroid binary 1999 KW4: Moshup 1.5km and Squannit 0.5km, mutual orbit in 17 hours. Measured by #TeamRadar from Arecibo (😭)

Evolution of system depends on YORP effect, relative spins of bodies, and shapes.

Doing shape-model libration simulations now.

#SolarSystemInContext

Today on the #arXiv :

White et al. 2025, "Ground-Based Radar Tracking of Near-Earth Objects With VLBI Radio Telescopes: 2024 MK Test Case" - https://arxiv.org/abs/2509.15684

#TeamRadar

Transmitting with DSS-43 and DSS-35 and receiving with antennas across Australia.

Today on the #arXiv :

White et al. 2025, "Ground-Based Radar Tracking of Near-Earth Objects With VLBI Radio Telescopes: 2024 MK Test Case" - https://arxiv.org/abs/2509.15684

#TeamRadar

Transmitting with DSS-43 and DSS-35 and receiving with antennas across Australia.

I have a 3D print of the old #TeamRadar #1998KY26 shape model, which was always suspiciously symmetric - because it turned out to be aliased.

Maybe I should order a new one.

QT Agata Rożek @agastro.bsky.social‬
2025 September 18

Check out our tiny rock featured by @esoastronomy !

Now available in Nature Comms: https://www.nature.com/articles/s41467-025-63697-4

We measured the size using the new lightcurve shape models and old radar data #TeamRadar

https://bsky.app/profile/agastro.bsky.social/post/3lz44rubvus26

I have a 3D print of the old #TeamRadar #1998KY26 shape model, which was always suspiciously symmetric - because it turned out to be aliased.

Maybe I should order a new one.

QT Agata Rożek @agastro.bsky.social‬
2025 September 18

Check out our tiny rock featured by @esoastronomy !

Now available in Nature Comms: https://www.nature.com/articles/s41467-025-63697-4

We measured the size using the new lightcurve shape models and old radar data #TeamRadar

https://bsky.app/profile/agastro.bsky.social/post/3lz44rubvus26

#TeamRadar has a large block of presentations at #EPSCDPS2025:

Zambrano Marin reviews the Arecibo radar data archive - https://meetingorganizer.copernicus.org/EPSC-DPS2025/EPSC-DPS2025-845.html

Cannon et al. presents shape models of the contact binaries 2024 ON and 2000 RS11: https://meetingorganizer.copernicus.org/EPSC-DPS2025/EPSC-DPS2025-1068.html

#TeamRadar has a large block of presentations at #EPSCDPS2025:

Zambrano Marin reviews the Arecibo radar data archive - https://meetingorganizer.copernicus.org/EPSC-DPS2025/EPSC-DPS2025-845.html

Cannon et al. presents shape models of the contact binaries 2024 ON and 2000 RS11: https://meetingorganizer.copernicus.org/EPSC-DPS2025/EPSC-DPS2025-1068.html

The #TeamRadar sessions at #EPSCDPS2025 begin with Anne Virkki reviewing the relationships between the properties of planetary surfaces and how they scatter radar beams: https://meetingorganizer.copernicus.org/EPSC-DPS2025/EPSC-DPS2025-52.html

The #TeamRadar sessions at #EPSCDPS2025 begin with Anne Virkki reviewing the relationships between the properties of planetary surfaces and how they scatter radar beams: https://meetingorganizer.copernicus.org/EPSC-DPS2025/EPSC-DPS2025-52.html

Rick highlighted #TeamRadar radar astrometry of #Apophis and its role in ruling out any possibility of impact in the foreseeable future.

Per Brozovic et al. 2018 - https://echo.jpl.nasa.gov/asteroids/brozovic.etal.apophis.2018.pdf

Rick highlighted #TeamRadar radar astrometry of #Apophis and its role in ruling out any possibility of impact in the foreseeable future.

Per Brozovic et al. 2018 - https://echo.jpl.nasa.gov/asteroids/brozovic.etal.apophis.2018.pdf

Also today on the #arXiv:

Fan, Wright, & Lazio 2025, "Detecting Extraterrestrial Civilizations That Employ an Earth-level Deep Space Network" - https://arxiv.org/abs/2508.15425

Updating studies of the radio leakage from spacecraft communications and #TeamRadar observations.

Also today on the #arXiv:

Fan, Wright, & Lazio 2025, "Detecting Extraterrestrial Civilizations That Employ an Earth-level Deep Space Network" - https://arxiv.org/abs/2508.15425

Updating studies of the radio leakage from spacecraft communications and #TeamRadar observations.

#TeamRadar

"NASA’s Europa Clipper Radar Instrument Proves Itself at Mars"

https://www.nasa.gov/missions/europa-clipper/nasas-europa-clipper-radar-instrument-proves-itself-at-mars/

#TeamRadar

"NASA’s Europa Clipper Radar Instrument Proves Itself at Mars"

https://www.nasa.gov/missions/europa-clipper/nasas-europa-clipper-radar-instrument-proves-itself-at-mars/

It is easier to make resolved images of Betelgeuse itself than it is to see the companion star, because making images of Betelgeuse does not require dynamic range of near a hundred.

And, in case anyone is confused:

Speckle imaging as done here is entirely different from speckle tracking as done by #TeamRadar.

It is easier to make resolved images of Betelgeuse itself than it is to see the companion star, because making images of Betelgeuse does not require dynamic range of near a hundred.

And, in case anyone is confused:

Speckle imaging as done here is entirely different from speckle tracking as done by #TeamRadar.

Since I was asked:

Interstellar object 3I / #A11pl3Z will not be passing close enough to Earth to be observed by #TeamRadar.

Alas for the loss of Arecibo (although depending on the exact size of 3I, even Arecibo might not have been enough).

Since I was asked:

Interstellar object 3I / #A11pl3Z will not be passing close enough to Earth to be observed by #TeamRadar.

Alas for the loss of Arecibo (although depending on the exact size of 3I, even Arecibo might not have been enough).

Nice article about #TeamRadar by Nola Taylor Tillman in Space.com today:

https://www.space.com/astronomy/asteroids/after-the-arecibo-collapse-in-2020-a-lone-nasa-radar-dish-in-the-mojave-desert-stepped-up-as-a-leading-asteroid-hunter

Nice article about #TeamRadar by Nola Taylor Tillman in Space.com today:

https://www.space.com/astronomy/asteroids/after-the-arecibo-collapse-in-2020-a-lone-nasa-radar-dish-in-the-mojave-desert-stepped-up-as-a-leading-asteroid-hunter

#TeamRadar presentations at #PDC2025, continued:

Pupillo et al., "Radar Observation of Asteroids 2005 LW3 and 2006 WB with European Radio Telescopes" - https://iaa.4hdt.ro/event/1/contributions/111/ .

Venditti et al., "The potentially hazardous binary asteroid (285263) 1998 QE2" - https://iaa.4hdt.ro/event/1/contributions/150/

#TeamRadar presentations at #PDC2025, continued:

Pupillo et al., "Radar Observation of Asteroids 2005 LW3 and 2006 WB with European Radio Telescopes" - https://iaa.4hdt.ro/event/1/contributions/111/ .

Venditti et al., "The potentially hazardous binary asteroid (285263) 1998 QE2" - https://iaa.4hdt.ro/event/1/contributions/150/

#TeamRadar presentations at #PDC2025 :

Benner et al., "Status of Near-Earth Asteroid Radar Observations at Goldstone" https://iaa.4hdt.ro/event/1/contributions/140/

Brozovic et al., "3D shape model and spin state of 99942 Apophis estimated from 2013 radar and lightcurve data" https://iaa.4hdt.ro/event/1/contributions/9/

Calves et al., "Radar and optical tracking of Near-Earth Objects at the University of Tasmania" https://iaa.4hdt.ro/event/1/contributions/105/

Horiuchi et al., "Southern Hemisphere Asteroid Radar Program (SHARP)" https://iaa.4hdt.ro/event/1/contributions/17/

#TeamRadar presentations at #PDC2025 :

Benner et al., "Status of Near-Earth Asteroid Radar Observations at Goldstone" https://iaa.4hdt.ro/event/1/contributions/140/

Brozovic et al., "3D shape model and spin state of 99942 Apophis estimated from 2013 radar and lightcurve data" https://iaa.4hdt.ro/event/1/contributions/9/

Calves et al., "Radar and optical tracking of Near-Earth Objects at the University of Tasmania" https://iaa.4hdt.ro/event/1/contributions/105/

Horiuchi et al., "Southern Hemisphere Asteroid Radar Program (SHARP)" https://iaa.4hdt.ro/event/1/contributions/17/

#WithoutNSF we would not have had the Arecibo Observatory until 2020; and we would not have the Green Bank Telescope, the Very Large Array, or the Very Long Baseline Array - all of which #TeamRadar has used to make sure that asteroids are not going to fall from the sky.

#WithoutNSF we would not have had the Arecibo Observatory until 2020; and we would not have the Green Bank Telescope, the Very Large Array, or the Very Long Baseline Array - all of which #TeamRadar has used to make sure that asteroids are not going to fall from the sky.

Today in the Planetary Science Journal:

Zambrano-Marin et al. 2025, "2020 BX12—The Last Binary Asteroid Discovered at Arecibo"

#TeamRadar

Today in the Planetary Science Journal:

Zambrano-Marin et al. 2025, "2020 BX12—The Last Binary Asteroid Discovered at Arecibo"

#TeamRadar

For comparison: Operating costs for #TeamRadar are about $1 per second of observing time.

QT David Shiffman, Ph.D.
‪@whysharksmatter.bsky.social‬
2025 April 15

In the wake of the ongoing disasters with funding streams, I'm seeing lots of folks suggest that scientists turn to social media crowdfunding to fund their research.

For about a decade I held the record for the social media crowdfunded project that got the most funding. I received about $9,000.
https://bsky.app/profile/whysharksmatter.bsky.social/post/3lmrm6phwjc2s

For comparison: Operating costs for #TeamRadar are about $1 per second of observing time.

QT David Shiffman, Ph.D.
‪@whysharksmatter.bsky.social‬
2025 April 15

In the wake of the ongoing disasters with funding streams, I'm seeing lots of folks suggest that scientists turn to social media crowdfunding to fund their research.

For about a decade I held the record for the social media crowdfunded project that got the most funding. I received about $9,000.
https://bsky.app/profile/whysharksmatter.bsky.social/post/3lmrm6phwjc2s

#TeamRadar #Apophis planning page, with the hope that we can do all of this 4 years from now: https://echo.jpl.nasa.gov/asteroids/apophis.2029.goldstone.planning.html

#TeamRadar #Apophis planning page, with the hope that we can do all of this 4 years from now: https://echo.jpl.nasa.gov/asteroids/apophis.2029.goldstone.planning.html

#TeamRadar presentations at #Apophis T-4:

Benner et al., "Goldstone Radar Observations of 99942 Apophis in 2029: Detailed Plans" - https://www.hou.usra.edu/meetings/apophis2025/pdf/2058.pdf

Horiuchi et al., "Southern Hemisphere Asteroid Radar Program (SHARP) and the Apophis Encounter in 2029" - https://www.hou.usra.edu/meetings/apophis2025/pdf/2037.pdf

#TeamRadar presentations at #Apophis T-4:

Benner et al., "Goldstone Radar Observations of 99942 Apophis in 2029: Detailed Plans" - https://www.hou.usra.edu/meetings/apophis2025/pdf/2058.pdf

Horiuchi et al., "Southern Hemisphere Asteroid Radar Program (SHARP) and the Apophis Encounter in 2029" - https://www.hou.usra.edu/meetings/apophis2025/pdf/2037.pdf

It has also been nearly 20 years now since I got to help observe #Apophis with the Arecibo Observatory as a #TeamRadar summer student.

Woah.

For the record:

Detectability per unit time of Cebreros transmitting 20 kW at X-band with a 35 m dish is about ~1 billion times less than detectability per unit time for #TeamRadar transmitting CW from Goldstone and ~10 billion times less than for Arecibo.

Assuming a real-time waltz.

Today on the #arXiv:

Tortora et al. 2025, "Radio Science Investigations for the Heavy Metal Mission to Asteroid (216) Kleopatra" - https://arxiv.org/abs/2503.15217

The Heavy Metal mission proposal would visit Kleopatra, understood as the barely-not-disrupted core of a protoplanet.

#TeamRadar approves.

And I recommend these two #TeamRadar presentations:

Benner et al. 2025, "Status of Near-Earth Asteroid Radar Observations at Goldstone" - https://www.hou.usra.edu/meetings/lpsc2025/pdf/1803.pdf

Fernandez et al. 2025, "Rotationally-Resolved Radar Scattering Properties of (433) Eros" - https://www.hou.usra.edu/meetings/lpsc2025/pdf/2421.pdf

Today on the #arXiv:

Cannon et al. 2025, "Shape and spin state model of contact binary (388188) 2006 DP14 using combined radar and optical observations" - https://arxiv.org/abs/2503.01499

Richard Cannon did good work on this latest from #TeamRadar.

#TeamRadar is obvious from a long way away.

QT Phil Plait @badastro
2025 February 28

So let's say you're an alien and you point your telescope at Earth.

What do you see?

[written by me, for SciAm]

https://www.scientificamerican.com/article/do-aliens-know-were-here/

https://mastodon.social/@badastro/114082533069129638

@michael_w_busch Yikes! #TeamRadar have more disturbing observing stories than most.