Re: Orion 3 Rk Obs (probably)

Ed Cannon (ecannon@mail.utexas.edu)
Thu, 06 May 1999 02:49:40 -0500

Sue Worden wrote:

] I just observed what I believe
] was the Orion 3 Rk (99 24B / 25728), peak magnitude about +1.0,
] one-power in light polluted skies with Polaris barely visible.
] ...
]   30.314  97.866  920.   BCRC, Austin, Texas      1950  6.0 22 F F T T T
] ***  1999 May   5  Wed evening  *** Times are PM CDT  ***  2057  559
]  H  M  S  Tim Al Azi C Dir  Mag Dys F  Hgt Shd  Rng  EW Phs  R A   Dec
] 25727 Orion 3        99 24A                        
]  9  7 22   .0 54 191 C 266 19.2   0 9  269 170  328 2.8  70 10 2  -5.4
] 25728 Orion 3 Rk     99 24B                         3.0 Delta 3 
]  9  7 56   .0 54 190 C 266  2.2   0 9  268 168  326 2.9  70 10 3  -5.1

The culminations above were at 2:07:22 and 2:07:56 on 6 May UTC.  
Mike McCants tracked the leading object with his telescope, and I 
think he said the object was varying in magnitude.  It was barely 
visible at one-power (about +3.5 with some twilight still in the 
sky) from the BCRC site, which is significantly better than Sue's 
location for this observation.  If the really bright one (+1) 
that Sue and Mike and I observed was the Delta III, its intrinsic 
magnitude must be brighter than that of a Delta II!  

ORION 3
1 25727U 99024A   99126.20482701  .00468611 -39309-5  30580-3 0    73
2 25727  29.4954  43.5167 0850040 171.5159 190.0857 14.37573172   178
DELTA R/B
1 25728U 99024B   99126.13586133  .00680653 -38937-5  48974-3 0    74
2 25728  29.5218  44.1576 0848499 170.4339 191.3575 14.37186096   140
DEB
1 25729U 99024C   99126.06783565  .19020710 -55302-5  43866-2 0    65
2 25729  29.6163  43.8660 0543746 173.3247  42.0722 15.14575290   137

Ed Cannon - ecannon@mail.utexas.edu - Austin, Texas, USA