A Wide Orbit Exoplanet OGLE-2012-BLG-0838Lb. (arXiv:1901.05466v2 [astro-ph.EP] UPDATED)

A Wide Orbit Exoplanet OGLE-2012-BLG-0838Lb. (arXiv:1901.05466v2 [astro-ph.EP] UPDATED)
<a href="http://arxiv.org/find/astro-ph/1/au:+R%2E_P/0/1/0/all/0/1">Poleski R.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+D%2E_S/0/1/0/all/0/1">Suzuki D.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+A%2E_U/0/1/0/all/0/1">Udalski A.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+X%2E_X/0/1/0/all/0/1">Xie X.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+C%2E_Y/0/1/0/all/0/1">Yee J.C.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+N%2E_K/0/1/0/all/0/1">Koshimoto N.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+S%2E_G/0/1/0/all/0/1">Gaudi B.S.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+A%2E_G/0/1/0/all/0/1">Gould A.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+J%2E_S/0/1/0/all/0/1">Skowron J.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+K%2E_S/0/1/0/all/0/1">Szymanski M.K.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+I%2E_S/0/1/0/all/0/1">Soszynski I.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+P%2E_P/0/1/0/all/0/1">Pietrukowicz P.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+S%2E_K/0/1/0/all/0/1">Kozlowski S.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+L%2E_W/0/1/0/all/0/1">Wyrzykowski L.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+K%2E_U/0/1/0/all/0/1">Ulaczyk K.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+F%2E_A/0/1/0/all/0/1">Abe F.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+K%2E_B/0/1/0/all/0/1">Barry R.K.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+P%2E_B/0/1/0/all/0/1">Bennett D.P.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+A%2E_B/0/1/0/all/0/1">Bhattacharya A.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+A%2E_B/0/1/0/all/0/1">Bond I.A.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+M%2E_D/0/1/0/all/0/1">Donachie M.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+H%2E_F/0/1/0/all/0/1">Fujii H.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+A%2E_F/0/1/0/all/0/1">Fukui A.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Y%2E_I/0/1/0/all/0/1">Itow Y.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Y%2E_H/0/1/0/all/0/1">Hirao Y.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Y%2E_K/0/1/0/all/0/1">Kamei Y.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+I%2E_K/0/1/0/all/0/1">Kondo I.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+A%2E_L/0/1/0/all/0/1">Li M.C.A.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Y%2E_M/0/1/0/all/0/1">Matsubara Y.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+S%2E_M/0/1/0/all/0/1">Miyazaki S.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Y%2E_M/0/1/0/all/0/1">Muraki Y.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+M%2E_N/0/1/0/all/0/1">Nagakane M.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+C%2E_R/0/1/0/all/0/1">Ranc C.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+J%2E_R/0/1/0/all/0/1">Rattenbury N.J.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+K%2E_S/0/1/0/all/0/1">Satoh Y.K.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+H%2E_S/0/1/0/all/0/1">Shoji H.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+H%2E_S/0/1/0/all/0/1">Suematsu H.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+J%2E_S/0/1/0/all/0/1">Sullivan D.J.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+T%2E_S/0/1/0/all/0/1">Sumi T.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+J%2E_T/0/1/0/all/0/1">Tristram P.J.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+T%2E_Y/0/1/0/all/0/1">Yamakawa T.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+T%2E_Y/0/1/0/all/0/1">Yamawaki T.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+A%2E_Y/0/1/0/all/0/1">Yonehara A.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+C%2E_H/0/1/0/all/0/1">Han C.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+S%2E_D/0/1/0/all/0/1">Dong S.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+M%2E_M/0/1/0/all/0/1">Morzinski K.M.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+R%2E_M/0/1/0/all/0/1">Males J.R.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+M%2E_C/0/1/0/all/0/1">Close L.M.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+W%2E_P/0/1/0/all/0/1">Pogge R.W.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+_P%2E_B/0/1/0/all/0/1">Beaulieu J.-P.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+_B_M/0/1/0/all/0/1">Marquette J.-B</a>

We present the discovery of a planet on a very wide orbit in the microlensing
event OGLE-2012-BLG-0838. The signal of the planet is well separated from the
main peak of the event and the planet-star projected separation is found to be
twice larger than the Einstein ring radius, which roughly corresponds to a
projected separation of ~4 AU. Similar planets around low-mass stars are very
hard to find using any technique other than microlensing. We discuss
microlensing model fitting in detail and discuss the prospects for measuring
the mass and distance of lens system directly.

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