Alpo observations of the remote planets in 2012 2013
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ALPO Observations of the Remote Planets in 2012-2013. Richard W. Schmude, Jr. Gordon State College. Overview. Introduction Images Photometry Conclusions. Introduction. Seasonal brightness changes Uranus Neptune Images Visible Near-infrared. Images. Usually a large telescope

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ALPO Observations of the Remote Planets in 2012-2013

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ALPO Observations of the Remote Planets in 2012-2013

Richard W. Schmude, Jr.

Gordon State College


Overview

  • Introduction

  • Images

  • Photometry

  • Conclusions


Introduction

  • Seasonal brightness changes

    • Uranus

    • Neptune

  • Images

    • Visible

    • Near-infrared


Images

  • Usually a large telescope

    • 1.0 m Pic du Midi Observatory (France)

    • 1.29 m Skinakas Observatory (Greece)

  • Filters:

    • B, V, R

    • Near-infrared


Uranus: Sept. 14, 2012Flavius Isac 0.25 m SCT


Uranus: August 8, 2012F. Colas, J. L. Dauvergne, M. Delcroix, T. Legault & C. ViladrichPic du Midi 1.0 m telescope


Uranus: September 17, 2012A. Obukhov, Moscow Russia (C11 telescope)


Uranus: September 17, 2012J. Boudreau, MA, USA (C11)


Uranus Belt Latitudes

  • Equatorial Belt

    • 2° S to 13° N (3° uncertainty)

  • North Temperate Belt

    • 45 3° N to 59° N (3° uncertainty)


Neptune: August 27, 2012G. Maravelias and M. Kardasis Skinakas Observatory 1.29 m


Photometry

  • Measurement of Brightness

  • Accurate brightness measurements since 1950

  • B, V, R and I filters


Photometry: Uranus

V(1,a) = -7.117 ± 0.007

B – V = 0.47

R – V = 0.307

I – R = 1.18

*Uranus is a little fainter than in the previous apparition


Photometry: Neptune

V(1,a) = -7.005 ± 0.009

B – V = 0.384


Photometry: Oberon

  • September 24, 2012 unfiltered image:

    • Titania was 0.25 mag. brighter than Oberon


Conclusions

  • Several astronomers have imaged albedo features on Uranus using telescopes as small as a C11.

  • Uranus is a little fainter than in the previous apparition


Acknowledgements

P. Abbott, K. Bailey, J. Boudreau, F. Colas, J. L. Dauvergne, M. Delcroix, F. Emond, J. Fox, M, Kardasis, T. Legault, S. Maksymowicz, G. Maravelias, M. Mattei, F. Melillo, C. Pellier, J. P. Prost, T. Boyle, C. Viladrich

P. Abel, P. Bayle, G. Bianchi, D. Gray, T. Ikemura, F. Isac, A. Kazemoto, A. Lasala, P. Maxson, A. Medugno, S. Mogami, A. Obukhov, D. Peach, J. J. Poupeau, E. Punzo, S. Quaresima, H. Sasse, J. Sussenbach, G. Tarsoudis and A. Yamazaki


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