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#3iatlas — Public Fediverse posts

Live and recent posts from across the Fediverse tagged #3iatlas, aggregated by home.social.

  1. Hello @[email protected] #EPSC2026 here in Den Haag! Looking forward the #3I/Atlas keynote today, plus I will be presenting some @[email protected] related-work in the small body dynamics session SB12 later, and I also have another talk Thurs. Gonna be a busy week! #PlanetSci

  2. 2026-09-07 00:00:00 UTC (Delta: 2026-09-06)

    INTERSTELLAR VISITOR: 3I/ATLAS
    - Barycentric speed: 59.36 km/s (-0.00 km/s)
    - Crossing Uranus's orbit in: 231 days

    🌎 Relative to Earth
    - Distance (km): 1,725,548,261.22 km (+2,871,595.04 km)
    - Distance (AU): 11.53 (+0.02)
    - Light travel time: 1 h 35 min 55.81 s (+9.58 s)

    #3IAtlas #InterstellarObject

  3. 2026-09-06 00:00:00 UTC (Delta: 2026-09-05)

    INTERSTELLAR VISITOR: 3I/ATLAS
    - Barycentric speed: 59.36 km/s (-0.00 km/s)
    - Crossing Uranus's orbit in: 232 days

    🌎 Relative to Earth
    - Distance (km): 1,722,676,666.18 km (+2,896,760.51 km)
    - Distance (AU): 11.52 (+0.02)
    - Light travel time: 1 h 35 min 46.23 s (+9.66 s)

    #3IAtlas #InterstellarObject

  4. 2026-09-06 00:00:00 UTC (Delta: 2026-09-05)

    INTERSTELLAR VISITOR: 3I/ATLAS
    - Barycentric speed: 59.36 km/s (-0.00 km/s)
    - Crossing Uranus's orbit in: 232 days

    🌎 Relative to Earth
    - Distance (km): 1,722,676,666.18 km (+2,896,760.51 km)
    - Distance (AU): 11.52 (+0.02)
    - Light travel time: 1 h 35 min 46.23 s (+9.66 s)

    #3IAtlas #InterstellarObject

  5. 2026-09-06 00:00:00 UTC (Delta: 2026-09-05)

    INTERSTELLAR VISITOR: 3I/ATLAS
    - Barycentric speed: 59.36 km/s (-0.00 km/s)
    - Crossing Uranus's orbit in: 232 days

    🌎 Relative to Earth
    - Distance (km): 1,722,676,666.18 km (+2,896,760.51 km)
    - Distance (AU): 11.52 (+0.02)
    - Light travel time: 1 h 35 min 46.23 s (+9.66 s)

    #3IAtlas #InterstellarObject

  6. 2026-09-06 00:00:00 UTC (Delta: 2026-09-05)

    INTERSTELLAR VISITOR: 3I/ATLAS
    - Barycentric speed: 59.36 km/s (-0.00 km/s)
    - Crossing Uranus's orbit in: 232 days

    🌎 Relative to Earth
    - Distance (km): 1,722,676,666.18 km (+2,896,760.51 km)
    - Distance (AU): 11.52 (+0.02)
    - Light travel time: 1 h 35 min 46.23 s (+9.66 s)

    #3IAtlas #InterstellarObject

  7. 2026-09-06 00:00:00 UTC (Delta: 2026-09-05)

    INTERSTELLAR VISITOR: 3I/ATLAS
    - Barycentric speed: 59.36 km/s (-0.00 km/s)
    - Crossing Uranus's orbit in: 232 days

    🌎 Relative to Earth
    - Distance (km): 1,722,676,666.18 km (+2,896,760.51 km)
    - Distance (AU): 11.52 (+0.02)
    - Light travel time: 1 h 35 min 46.23 s (+9.66 s)

    #3IAtlas #InterstellarObject

  8. 2026-09-05 00:00:00 UTC (Delta: 2026-09-04)

    INTERSTELLAR VISITOR: 3I/ATLAS
    - Barycentric speed: 59.37 km/s (-0.00 km/s)
    - Crossing Uranus's orbit in: 233 days

    🌎 Relative to Earth
    - Distance (km): 1,719,779,905.66 km (+2,922,475.93 km)
    - Distance (AU): 11.50 (+0.02)
    - Light travel time: 1 h 35 min 36.57 s (+9.75 s)

    #3IAtlas #InterstellarObject

  9. 2026-09-05 00:00:00 UTC (Delta: 2026-09-04)

    INTERSTELLAR VISITOR: 3I/ATLAS
    - Barycentric speed: 59.37 km/s (-0.00 km/s)
    - Crossing Uranus's orbit in: 233 days

    🌎 Relative to Earth
    - Distance (km): 1,719,779,905.66 km (+2,922,475.93 km)
    - Distance (AU): 11.50 (+0.02)
    - Light travel time: 1 h 35 min 36.57 s (+9.75 s)

    #3IAtlas #InterstellarObject

  10. 2026-09-05 00:00:00 UTC (Delta: 2026-09-04)

    INTERSTELLAR VISITOR: 3I/ATLAS
    - Barycentric speed: 59.37 km/s (-0.00 km/s)
    - Crossing Uranus's orbit in: 233 days

    🌎 Relative to Earth
    - Distance (km): 1,719,779,905.66 km (+2,922,475.93 km)
    - Distance (AU): 11.50 (+0.02)
    - Light travel time: 1 h 35 min 36.57 s (+9.75 s)

    #3IAtlas #InterstellarObject

  11. 2026-09-05 00:00:00 UTC (Delta: 2026-09-04)

    INTERSTELLAR VISITOR: 3I/ATLAS
    - Barycentric speed: 59.37 km/s (-0.00 km/s)
    - Crossing Uranus's orbit in: 233 days

    🌎 Relative to Earth
    - Distance (km): 1,719,779,905.66 km (+2,922,475.93 km)
    - Distance (AU): 11.50 (+0.02)
    - Light travel time: 1 h 35 min 36.57 s (+9.75 s)

    #3IAtlas #InterstellarObject

  12. 2026-09-05 00:00:00 UTC (Delta: 2026-09-04)

    INTERSTELLAR VISITOR: 3I/ATLAS
    - Barycentric speed: 59.37 km/s (-0.00 km/s)
    - Crossing Uranus's orbit in: 233 days

    🌎 Relative to Earth
    - Distance (km): 1,719,779,905.66 km (+2,922,475.93 km)
    - Distance (AU): 11.50 (+0.02)
    - Light travel time: 1 h 35 min 36.57 s (+9.75 s)

    #3IAtlas #InterstellarObject

  13. Finally an RGB image of comet #3IATLAS from images taken by #GeminiNorth during the 26 November #shadowTheScientists session: noirlab.edu/public/news/noirla - the coma has become bluer due to more gas emission. Also published today: an X-ray image by XMM-Newton at esa.int/ESA_Multimedia/Images/ with explanations in cbat.eps.harvard.edu/iau/cbet/ which also contains more 3I news.

    Meanwhile the paper iopscience.iop.org/article/10. claims an upper limit for 3I's nucleus diameter of only some 750 meters from the measured non-gravitational acceleration (NGA) parameters: that would be waaay more stringent than the 5.6 km upper limit from early Hubble observations reported in iopscience.iop.org/article/10. (where also a lower limit of 440 meters is stated).

  14. And here is what comet #3IATLAS looks like for the #geminiNorth Integral Field Unit (IFU) taking numerous spectra from points across the coma - from #ShadowTheScientists

  15. The #GeminiNorth telescopes is observing the interstellar comet #3IATLAS right now: here is the acquisition image from moments ago, spectra to be taken now - from the #ShadowTheScientists session.