J/AJ/115/1076 UBRVI photometry of Collinder 110 (Dawson+, 1998)
Collinder 110: an old open cluster in Monoceros.
Dawson D.W., Ianna P.A.
<Astron. J. 115, 1076 (1998)>
=1998AJ....115.1076D 1998AJ....115.1076D
ADC_Keywords: Clusters, open ; Photometry, UBVRI
Keywords: open clusters and associations: individual (Collinder 110)
Abstract:
Results of photoelectric UBVRI photometry of 78 stars and photographic
PDS and CCD photometry for 437 stars are presented for Collinder 110,
an old open cluster at low Galactic latitude. Proper motions obtained
from Lick Sky Survey plates were used to identify 39 stars as
foreground objects. The cluster's reddening, distance, and age are
estimated as E(B-V)=0.50±0.03mag, r=1950±300pc, and
t=1.4±0.3Gyr, assuming a solar metal abundance.
Objects:
----------------------------------------------------------
RA (2000) DE Designation(s)
----------------------------------------------------------
06 38 24 +02 00.0 Collinder 110
----------------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 81 78 Photoelectric photometry
table5.dat 81 489 Photographic data
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 A4 --- DI Star designation (1)
6- 12 F7.4 mm Xpos x position (2)
14- 21 F8.4 mm Ypos y position (2)
23- 28 F6.3 mag Vmag ? V magnitude
30- 35 F6.3 mag Bmag B magnitude
36 A1 --- u_Bmag Uncertainty flag on Bmag
38- 43 F6.3 mag Umag ? U magnitude
44 A1 --- u_Umag Uncertainty flag on Umag
46- 50 F5.3 mag U-B ? U-B colour index
51 A1 --- u_U-B Uncertainty flag on U-B
53- 57 F5.3 mag B-V ? B-V colour index
58 A1 --- u_B-V Uncertainty flag on B-V
60- 64 F5.3 mag V-R ? V-R colour index
66- 70 F5.3 mag R-I ? R-I colour index
72- 76 F5.3 mag V-I ? V-I colour index
78- 81 A4 --- Nobs Number of observations
--------------------------------------------------------------------------------
Note (1): The star number refers to quadrant-and-ring notation; e.g.,
star 1282 is number 82 in ring 2 of quadrant I. Stars are named
<Cl* Collinder 110 DI NNNN> in Simbad. Notes:
Star 4132 = Has faint, close companion
Star 1201 = Close double
Star 1311 = S-11
Star 1319 = S-2
Star "A" = SAO 114212 = BD+02 1332 (K0; mv= 8.3)
Note (2): The cluster center is at (x, y)~(20.8, 6.4) and the most positive
(+, +) coordinates lie in quadrant III. North is up, and east is to
the right; 1mm=55"
--------------------------------------------------------------------------------
Table 4: Stars rejected for high background values
--------------------------------------------------
Plate Usable stars Rejected (%)
--------------------------------------------------
3654 (V) 400 37 (8.5)
3664 (V) 401 36 (8.2)
3661 (B) 401 36 (8.2)
Va265 (B) 400 37 (8.5)
Va318 (B) 396 41 (9.4)
3655 (U) 417 20 (4.6)
3662 (U) 416 21 (4.8)
3666 (U) 407 29 (6.7)
--------------------------------------------------
Byte-by-byte Description of file: table5.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 --- DI [1101/4380] Star designation
5 A1 --- m_DI Multiplicity index on DI
7- 14 F8.4 mm Xpos x position
16- 23 F8.4 mm Ypos y position
25- 29 F5.2 mag Vmag ? V magnitude
30 A1 --- u_Vmag Uncertainty flag on Vmag
32- 35 F4.2 mag B-V ? B-V colour index
36 A1 --- u_B-V Uncertainty flag on B-V
38- 42 F5.2 mag U-B ? U-B colour index
43 A1 --- u_U-B Uncertainty flag on U-B
45- 50 F6.2 10mas/yr pmx ? Proper motion along x direction
52- 56 F5.2 10mas/yr pmy ? Propoer motion along y direction
58- 87 A30 --- Rem Remarks
--------------------------------------------------------------------------------
History: From AJ electronic version
(End) James Marcout, Patricia Bauer [CDS] 09-Mar-1999