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Science

NASA's Swift satellite to reenter atmosphere next week, visible from Puerto Rico this weekend

The Sociedad de Astronomía del Caribe estimates reentry between Nov. 3-6 with highest probability on the night of Nov. 4, most likely over the ocean, and has identified two final observation windows from the island.

NASA's Swift Gamma Ray Burst Detecting Satellite in spacePhoto
NASA's Swift Gamma Ray Burst Detecting Satellite Photo: NASA E/PO, Sonoma State University/Aurore Simonnet / Wikimedia Commons, Public domain (cropped)

The short version

  • El Vocero and Primera Hora report the Swift satellite will reenter between Nov. 3 and 6, with greater probability on the night of Wednesday, Nov. 4
  • SAC states the satellite is losing orbital height and atmospheric friction will likely disintegrate most of it, making surface fragments extremely unlikely
  • Possible ground tracks if over land include South America, southern Africa, areas near Thailand and Malaysia, with lower probability for Central America, Australia and India
  • SAC identifies viewing times from Puerto Rico on Saturday, Oct. 31 between 7:04-7:06 p.m. looking west and Sunday, Nov. 1 between 6:46-6:48 p.m. looking southwest

Reentry timeline and visibility

The Swift satellite, which studied intense cosmic phenomena including gamma rays from black holes and supernovae, is approaching its reentry into Earth's atmosphere. El Vocero reported that the Sociedad de Astronomía del Caribe (SAC) estimates the reentry will occur between Nov. 3 and 6, preliminarily with greater probability during the night of Wednesday, Nov. 4. The organization added that the exact time, date and location could still change as new data on the satellite's altitude and trajectory become available.

According to both El Vocero and Primera Hora, the satellite can be observed from Puerto Rico this weekend as a bright point resembling a moving star. On Saturday, Oct. 31 it will be visible between 7:04 p.m. and 7:06 p.m. looking toward the western horizon. On Sunday, Nov. 1 the window is between 6:46 p.m. and 6:48 p.m. looking southwest. SAC described these as among the last visible passes over the Caribbean before reentry.

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Uncertainty over impact location

SAC told both outlets that predicting the precise reentry point remains very difficult because forecasts can shift with updated information. El Vocero reported there is a higher probability the disintegration will occur over the ocean. If it happens over land, preliminary possible regions include South America, southern Africa and areas near Thailand and Malaysia. Regions with lower probability are parts of Central America, Australia and India.

The organization stated that atmospheric friction is expected to destroy almost the entire spacecraft before it reaches the surface, making the chance of any fragments landing extremely low though not impossible. Primera Hora reported the same assessment. SAC has captured images of the satellite during its recent visible passes over Puerto Rico.

Where the sources differ

Both El Vocero and Primera Hora rely on the same SAC information and agree on the reentry window of Nov. 3-6 with highest probability on the night of Nov. 4, the two weekend viewing times from Puerto Rico, the higher chance of oceanic disintegration, the listed possible land regions, and the low probability of fragments reaching the ground. El Vocero provides additional background on the satellite's scientific mission, the failed Link rescue satellite attempt, and notes that forecasts can change with new data on height and trajectory. Primera Hora adds that the satellite appears similar to other satellites visible to the naked eye under good conditions. The sources do not conflict on any factual claims.

What the reports do not say

The reports do not specify the satellite's current altitude, its exact mass or dimensions, the agencies or companies providing the latest tracking data, any official NASA statement on the reentry, or concrete steps for the public if fragments were to reach the ground. They also do not indicate whether additional viewing opportunities might exist after the weekend or how the public should report any potential sightings of debris.

Sources

Every link below was opened and checked when this story was published. Official means a government body, agency or the organization itself; Reporting means a news outlet.

  1. Reporting Satélite de la NASA caerá a la Tierra en los próximos días: ¿Podrá verse desde Puerto Rico?El Vocero (El Vocero) · elvocero.com · Spanish · checked Oct 31, 5:30 PM AST
  2. Reporting Satélite que caerá a la Tierra podrá verse desde Puerto RicoPrimera Hora (Primera Hora) · primerahora.com · Spanish · checked Oct 31, 5:30 PM AST

How we checked this

El Vocero and Primera Hora both based their coverage on statements from the Sociedad de Astronomía del Caribe. Details on the satellite's scientific history and the unsuccessful Link rescue mission appear only in El Vocero. All probabilities, viewing times and possible geographic corridors rest on the single SAC source.

ScienceNASASatellite reentryAstronomy

Compiled by the PuertoRico.com News Desk from the reports and statements listed above, and checked against them before publishing. It does not include original interviews. Spot an error? Email support@puertorico.com with a link to this story.

Castillo San Felipe del Morro and Old San Juan from the airNils Huenerfuerst / Wikimedia Commons · CC BY 4.0

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