Summary (in process of updating)

MOPS has reported some peculiar magnitudes in y-band MD data offsets and larger scatter compared to predictions of asteroid y-band magnitudes while the same comparison to 3PI photometry looks reasonable (both cases are photometry from the respective diffims). Also, have found photometry from Warp-Stack (WS) difference images for two sequential MD exposures unrealistically different by >0.5 mag.

Example: MD10 sequential exposure pair, asteroid (12891) (Peter Vereš)

o6157g0218o o6157g0219o

ra: 353.142622 ra: 353.142215

dec:-0.086658 dec: -0.086867

asteroid (12891)

• y-band magnitudes you get from the SMF catalogs is much more in line with what we would expect. We can't be more exact because previously unstudied.

Example: MD09, TNO145452 (Alan Fitzsimmons)

TNO 145452

• a bit faint but its' the best one I've found so far, as it stays in the field for a long long time.
• in MD09 where we can predict the y magnitude should be within 0.1 mag of ~19.3 for the below observations
• a bunch of y-band exposures and positions on two separate dates:

  o6107g0064o  334.194813  +0.274227  
  o6107g0065o  334.199167  +0.283357  
  o6107g0066o  334.194763  +0.292497  
  o6107g0067o  334.184892  +0.294695  
  o6107g0068o  334.176975  +0.288368  
  
  o6201g0056o  334.176975  +0.288387
  o6201g0057o  334.176992  +0.278257
  o6201g0058o  334.184921  +0.271952