Planet Hunters Talk

APH0000q6f / EPIC no: 210512752

  • jiipee by jiipee

    small but obvious transits w/ approx 6 days period

    Posted

  • Dolorous_Edd by Dolorous_Edd

    210512752 - https://www.cfa.harvard.edu/~avanderb/k2c4/ep210512752.html

    period - 5.874608

    Contamination? transits are a bit different?

    enter image description here

    Posted

  • Dolorous_Edd by Dolorous_Edd

    UKIDSS image

    LC extracted from star in red circle

    enter image description here

    Posted

  • ajamyajax by ajamyajax

    210512752: @jiipee, good spotting. Agree that's a valid transit and a possible a planet candidate.. But this LC could also be very blended as DE already noted with a nearby star and possible companion. So could be difficult to confirm. This proposal is listed in the archive: "GO4046: Lepine A search for exoplanets and close stellar/substellar companions in the local halo population."

    Edit: as spotted by Planet Hunters:
    http://talk.planethunters.org/#/subjects/APH0000q6f

    s1=2234.15 p1=5.869 d1=0.09 (2.16 hours +/-)

    EPIC, 2MASS, J mag, H mag, K mag, J - H, H - K, (J-H spectral type, stellar mass est) (H-K spectral type, stellar mass est)

    210512752 , 2MASS J04012962+1537238 , 14.535 , 13.896 , 13.681 , 0.639 , 0.215 , ('M8V', 0.082) , ('M0V', 0.58)

    au min-max 0.05 0.055

    stellar diameter in solar units min-max 0.48 0.61

    stellar mass in solar units min-max 0.485 0.645

    period in days min-max 5.864 5.866

    duration in hours min-max 2.004 2.317

    T1

    Update: Aladin Lite image of 210512752:

    AL1
    F1

    Posted

  • ajamyajax by ajamyajax in response to Dolorous Edd's comment.

    Ivan, are we sure the target isn't the (possible) dim red dwarf centered in the AladinLite image I posted? You know more about these images than I do.

    Posted

  • Dolorous_Edd by Dolorous_Edd in response to ajamyajax's comment.

    That giant white blob in red square

    enter image description here

    I got the impression that it is red dwarf + nearby bright star ,from the looks of it

    Seems to me, Kepler cannot resolve them, Mark

    Posted

  • ajamyajax by ajamyajax in response to Dolorous Edd's comment.

    Ok, that makes sense. The dimmer star just seems like the 16.773 Kep Mag to me. But I don't look at these images often. Should do more of that.

    And I appreciate the help, thanks.

    Update: 210512752 probably not a PC because a neighbor to 210512842 with a similar period transit.

    Posted

  • davidbundy77 by davidbundy77

    See also discussion here http://talk.planethunters.org/#/boards/BPH0000007/discussions/DPH0000qr5 on page 10. The light curves of the two stars are almost identical, so contamination possibly by a background eclipsing binary is likely.

    Posted