symaski62

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About symaski62

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    faire de la science

  1. C/2024 G3 (ATLAS) janvier 2025

    symaski62 replied to symaski62's topic in General Astronomy

    C/2024 G3 (ATLAS) https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=C%2F2024 G3 M1 + K1 = rouge M2 + K2 = bleu http://www.aerith.net/comet/catalog/2024G3/2024G3.html (japonaise - anglais) m1 = 9.0 + 5 log d + 10.0 log r
  2. http://astro.vanbuitenen.nl/comet/2024G3 C/2024 G3 (ATLAS) 1 à -1.3 mag janvier 2025 dans 4 mois

  3. Les méga-constellations de satellites (Starlink etc.)

    symaski62 replied to Thierry Legault's topic in General Astronomy

    hier soir 22h00 à 23h00 satellites Starlink = 28 0 à 2 mag je regarde l'etoile (nord-ouest) etoile filante = 3

  4. Sonde JUNO : destination Jupiter

    symaski62 replied to jackbauer 2's topic in General Astronomy

    https://www.jpl.nasa.gov/news/danish-instrument-helps-nasas-juno-spacecraft-see-radiation?fbclid=IwY2xjawE1ab9leHRuA2FlbQIxMAABHcfXue5ob1wfrDibLSh-JgwRQ_TbjmcOiV_k6dDBkdySPS-UUw8VmLZObw_aem_fUS13vhJQy0wodoauCVGkA

  5. Gaia, bientôt J-100!

    symaski62 replied to celinedl's topic in General Astronomy

    https://arxiv.org/pdf/2407.19219 VVV 1256−62A = Gaia DR3 5863122429179888000 https://simbad.cds.unistra.fr/simbad/sim-id?Ident=%4018065345&Name=Gaia DR3 5863122429179888000&submit=submit Spectral type = DC WD Distance (pc) = 75.6 𝑇eff (K) = 4440 R (𝑅⊙) = ----- Mass (M⊙) = 0.62 VVV 1256−62B = Gaia DR3 5863122429178232704 https://simbad.cds.unistra.fr/simbad/sim-id?Ident=%4012166803&Name=2MASS J12564352-6202041&submit=submit Spectral type = sdL3 Distance (pc) = 70.4 𝑇eff (K) = 2298 R (𝑅⊙) = 0.089 Mass (M⊙) = 0.082

  6. Nova LMC 1968

    symaski62 replied to 2SPOT's topic in Spectroscopy and photometry

    oui , nom de l'étoile : Nova LMC 1968 = LMC V1341

  7. Nova LMC 1968

    symaski62 replied to 2SPOT's topic in Spectroscopy and photometry

    13-14 mag V1341 LMC

  8. Nova Vul 2024

    symaski62 replied to artemis's topic in Spectroscopy and photometry

    19 43 07.142 +21 00 20.21 https://exofop.ipac.caltech.edu/tess/target.php?id=359952634 TIC 359952634 Star Name(s): TIC 359952634, 2MASS J19430718+2100191, Gaia DR2 1825912166619933952, WISE J194307.08+210019.1 V 17.9496 ± 0.0472 mag Gaia EDR3 1825912166619933952 parallax 0.2767 mas phot_g_mean_mag 16.678766 mag phot_bp_mean_mag 18.153076 mag phot_rp_mean_mag 15.484861 mag
  9. https://www.swpc.noaa.gov/products/planetary-k-index K5
  10. https://simbad.cds.unistra.fr/simbad/sim-id?Ident=%4080662&Name=HD 225095&submit=submit V(km/s) -41.00 ( Ha = 6562.8 ) HD 225095
  11. mise à jour 9 mag http://astro.vanbuitenen.nl/comet/2023A3
  12. wow ! https://www.aavso.org/vsx/index.php?view=detail.top&oid=18633 iot Lyr Period 0.4657778 d (11.17867 h) https://britastro.org/specdb/object_summary.php?object_id=iot Lyr Be star iot Lyr: Be Star Total Number of Spectra: 41 First Spectrum: JD 2457210.426500 \ 6 Jul 2015 22:14:09.600000 UT Latest Spectrum: JD 2459896.288000 \ 12 Nov 2022 18:54:43.200000 UT voilà https://en.wikipedia.org/wiki/Iota_Lyrae anglais TESS light curve
  13. magnitude de +4 d'ici le 27 septembre = rouge culminant aux alentours de -3 le 9 octobre. = vert http://www.aerith.net/comet/catalog/2023A3/2023A3.html
  14. désole
  15. https://science.nasa.gov/missions/webb/nasas-webb-investigates-eternal-sunrises-sunsets-on-distant-world/