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Rob Seaman

@robseaman.bsky.social

Data scientist, archivist, and temporal engineer with the Catalina Sky Survey. CSS has discovered about half of all known near-Earth asteroids, including several small impactors, many comets, and a couple of mini-moons. https://catalina.lpl.arizona.edu

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Rob Seaman@robseaman.bsky.social · last yr.

Bad news, good news: "The asteroid’s probability of impacting the Moon has slightly increased from 3.8% to 4.3%. In the small chance that the asteroid were to impact, it would not alter the Moon’s orbit." #PlanetSci #K24Y04R #LunarRealEstateValuations

NASA’s Webb Observations Update Asteroid 2024 YR4’s Lunar Impact Odds - NASA Science

While asteroid 2024 YR4 is currently too distant to detect with telescopes from Earth, NASA’s James Webb Space Telescope collected one more observation of the

science.nasa.gov

Rob Seaman@robseaman.bsky.social · last yr.

"To stop the flow of music would be like the stopping of time itself, incredible and inconceivable." – Aaron Copland #peace #love #music #Heraclitus_and_Parmenides_are_unit_vectors_of_philosophy

Playing For Change | Official Website

Playing For Change entire library of Songs Around The World, Live Outside, PFC Band, Mark's Park videos. Featuring artists like Slash, Carlos Santana, John Paul Jones, Keith Richards, Sara Bareilles, ...

playingforchange.com

Rob Seaman@robseaman.bsky.social · last yr.

Observations from JWST and Cerro Paranal have narrowed the uncertainties for that pesky asteroid 2024 YR4 to hit the Moon on December 22, 2032. The estimated impact probability is now 3.8%. The risk for the Earth on the same date is now too low to report. Near Earth = Near Moon. #PlanetSci #MoonSci

NASA Update on the Size Estimate and Lunar Impact Probability of Asteroid 2024 YR4  - NASA Science

Since near-Earth asteroid 2024 YR4 was first discovered in December 2024, NASA and the worldwide planetary defense community have continued to observe the asteroid, which was ruled out as a significan...

science.nasa.gov

Rob Seaman@robseaman.bsky.social · last yr.

The Franklin Mint sold America in Space mini-coins in the 1970s. At the time, my father, Lew Seaman, was the Nimbus & Landsat Program Manager at the GE Space Technology Center. Dad managed four out of the 18 robotic missions in Series 2 & 3. All these spacecraft remain in orbit. #Space #Satellites

The Franklin Mint's series of shiny space medallions were sold on a subscription basis, two at a time, with matching crewed and robotic missions. They also released a series of mini-coins in silver. These are four of the 18 robotic missions.
Rob Seaman@robseaman.bsky.social · last yr.

Earth's rotation is being slowed by the tides. Length of the day increases about one second every 50,000 years while the Moon recedes about a mile to carry off its angular momentum. Over human timescales, the Earth's rotation follows a random walk and sometimes speeds up. #Astronomy #Science #Time

Plot of Solar Time minus Atomic Time with leap seconds indicated by jumps in the y-axis. Tenth-second calibrations are published by the International Earth Rotation Service (IERS). The Earth has recently been spinning up a bit, though the long term trend is tidal slowing causing the day to lengthen a few milliseconds per century.
Rob Seaman@robseaman.bsky.social · last yr.

“Vast gravitational forces have rotated the planet Earth on an axis drawn through its north and south poles,” said Dr. Elena Bilkins of the National Weather Service. “The Earth is in actuality spinning uncontrollably through space.” #YoureOnEarthTheresNoCureForThat #SamuelBeckett

Rotation Of Earth Plunges Entire North American Continent Into Darkness

NEW YORK—Millions of eyewitnesses watched in stunned horror Tuesday as light emptied from the sky, plunging the U.S. and neighboring countries into darkness. As the hours progressed, conditions only w...

theonion.com

Rob Seaman@robseaman.bsky.social · last yr.

Overview of the workflow of discovering NEOs from Mount Lemmon by my colleague David Rankin. The coordination among multiple teams funded by NASA's Planetary Defense Coordination Office (PDCO) is absolutely critical to the process. Discovery is also needed for science & future mining. #PlanetSci

Asteroid Hunters - The American Scholar

The scientists and engineers who defend our planet day and night from potentially hazardous space rocks

theamericanscholar.org

Rob Seaman@robseaman.bsky.social · last yr.

On-sky plot (left) of NEOs discovered over 3 days in Oct 2022. Table (right) of their various sizes and other properties. A typical batch of discoveries. One PHA. Big dots are discovery observations. NEOs move in all directions and rates, as shown, typically fading. Comments for more. #PlanetSci

Ecliptic latitude (y-axis) versus longitude, relative to solar opposition for discovery epoch observations of two dozen NEOs discovered between October 16-18, 2022.NEOfixer table for two dozen NEOs discovered by various surveys between October 16-18, 2022.
Rob Seaman@robseaman.bsky.social · last yr.

"I cannot generate code for you, as that would be completing your work. [...] You should develop the logic yourself. This ensures you understand the system and can maintain it properly. [...] Generating code for others can lead to dependency and reduced learning opportunities." #Wellitaintwrong

AI coding assistant refuses to write code, tells user to learn programming instead

Cursor AI tells user, “I cannot generate code for you, as that would be completing your work.”…

arstechnica.com