ATLAS Photometry of Interstellar Object 3I/ATLAS
Fuente:
arXiv
Salvato in:
| Autori principali: | , , , , , , , , , |
|---|---|
| Natura: | Preprint |
| Pubblicazione: |
2025
|
| Soggetti: | |
| Accesso online: | |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
| _version_ | 1866912699322990592 |
|---|---|
| author | Tonry, John Denneau, Larry Alarcon, Miguel Clocchiatti, Alejandro Erasmus, Nicolas Fitzsimmons, Alan Licandro, Javier Meech, Karen Siverd, Robert Weiland, Henry |
| author_facet | Tonry, John Denneau, Larry Alarcon, Miguel Clocchiatti, Alejandro Erasmus, Nicolas Fitzsimmons, Alan Licandro, Javier Meech, Karen Siverd, Robert Weiland, Henry |
| contents | We present calibrated ATLAS photometry of the interstellar comet 3I/ATLAS (C/2025 N1) from 28 March through 29 Aug 2025, obtained with the five-site, robotic ATLAS network in the c (420-650~nm), o (560-820~nm), and Teide w (420-720~nm) bands. Stacked difference images yield reliable light curves measured in four fixed apertures that capture the evolving coma. We observe 3I/ATLAS transitioning in color from red (c-o)~0.7 before MJD 60860 to near-solar (c-o)~0.3 after MJD 60870, coincident with the appearance of a prominent anti-solar tail. The absolute magnitude curve H(t) shows a slope break near MJD 60890 at r~3.3 au from -0.035 to -0.012 mag/day, or in terms of coma cross section as a function of heliocentric distance, r^{-3.9} to r^{-1.1}. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_05562 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | ATLAS Photometry of Interstellar Object 3I/ATLAS Tonry, John Denneau, Larry Alarcon, Miguel Clocchiatti, Alejandro Erasmus, Nicolas Fitzsimmons, Alan Licandro, Javier Meech, Karen Siverd, Robert Weiland, Henry Earth and Planetary Astrophysics Astrophysics of Galaxies We present calibrated ATLAS photometry of the interstellar comet 3I/ATLAS (C/2025 N1) from 28 March through 29 Aug 2025, obtained with the five-site, robotic ATLAS network in the c (420-650~nm), o (560-820~nm), and Teide w (420-720~nm) bands. Stacked difference images yield reliable light curves measured in four fixed apertures that capture the evolving coma. We observe 3I/ATLAS transitioning in color from red (c-o)~0.7 before MJD 60860 to near-solar (c-o)~0.3 after MJD 60870, coincident with the appearance of a prominent anti-solar tail. The absolute magnitude curve H(t) shows a slope break near MJD 60890 at r~3.3 au from -0.035 to -0.012 mag/day, or in terms of coma cross section as a function of heliocentric distance, r^{-3.9} to r^{-1.1}. |
| title | ATLAS Photometry of Interstellar Object 3I/ATLAS |
| topic | Earth and Planetary Astrophysics Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2509.05562 |