2001A&A...374..554P


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.24CEST05:56:41

2001A&A...374..554P - Astronomy and Astrophysics, volume 374, 554-563 (2001/8-1)

Open clusters or their remnants: B and V photometry of NGC 1901 and NGC 1252.

PAVANI D.B., BICA E., DUTRA C.M., DOTTORI H., SANTIAGO B.X., CARRANZA G. and DIAZ R.J.

Abstract (from CDS):

Photometry in the B and V bands is presented for the southern stellar groups NGC 1901 and NGC 1252. NGC 1901 is often described as an open cluster while NGC 1252 consists of a concentration of about 20 stars centered ≃20' north of the original New General Catalogue coordinates, and at the southwest edge of the large region previously assigned to this object in the literature. NGC1901 has a clear main sequence and shares similarities with the Hyades. We derive a reddening value E(B-V)=0.04, a distance from the Sun d=0.45kpc (Z=-0.23kpc) and an age 0.6±0.1Gyr. NGC 1901 is conclusively a physical system, dynamically comparable to or more evolved than the Hyades. The colour-magnitude diagram of NGC 1252 suggests a turnoff and main sequence, and a total of 12 probable members. We simulated the Galactic field colour-magnitude diagram in the same direction and found it to be a poor match to NGC 1252, suggesting that NGC 1252 is not a field fluctuation. Isochrone fitting to the probable members is consistent with E(B-V)=0.02, d=0.64kpc (Z=-0.46kpc) and an age 3±1Gyr. NGC 1252 cannot be ruled out as a physical group with the available data. If so, evidence is found that it is not a classical open cluster, but rather an open cluster remnant.

Abstract Copyright:

Journal keyword(s): galaxy: open clusters and stellar associations - galaxies: individual: NGC 1901, NGC 1252

Nomenclature: Table 2: Cl* NGC 1901 PBD N (Nos 1-4).

Simbad objects: 58

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Number of rows : 58

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NGC 104 GlC 00 24 05.359 -72 04 53.20   5.78 4.09     ~ 3575 0
2 NGC 1252 28 * 03 10 38.5108027999 -57 47 19.564737894 12.50 12.42 11.95   11.35 ~ 3 0
3 HD 20037 * 03 10 39.2338759420 -57 48 35.374337294   7.51 6.62     G8III 15 0
4 GSC 08498-01334 PM* 03 10 42.3472329875 -57 42 05.126384908     13.21     ~ 3 0
5 GSC 08498-01040 PM* 03 10 44.8759396431 -57 43 23.545672969     12.49     ~ 3 0
6 GSC 08498-01024 * 03 10 46.4472528768 -57 45 19.953675373     15.45     ~ 1 0
7 NGC 1252 Cl* 03 10 49 -57 46.0           ~ 34 0
8 HD 20059 PM* 03 10 49.9868514858 -57 42 06.400599715   9.69 8.67     K1III/IV 14 0
9 NGC 1252 12 * 03 10 50.1316810896 -57 47 08.420930621   12.39 11.97 11.96   ~ 3 0
10 GSC 08498-00928 * 03 10 51.6218734930 -57 49 20.822275388     14.33     ~ 2 0
11 GSC 08498-01321 * 03 10 51.7132704264 -57 40 05.993622007     15.29     ~ 1 0
12 NGC 1252 27 * 03 10 56.5451065467 -57 47 47.776608749 13.73 13.64 13.17   12.57 ~ 3 0
13 NGC 1252 16 * 03 10 59.8932193197 -57 44 40.871584696   13.92 13.24 13.39   ~ 3 0
14 NGC 1252 17 * 03 11 02.5715478062 -57 41 48.261623590   13.365 11.918     ~ 4 0
15 NGC 1252 14 * 03 11 04.3533679245 -57 46 22.866514850     12.91     ~ 3 0
16 CD-58 642 * 03 11 08.9926954949 -57 47 37.803548351   11.55 10.50     K0III 3 0
17 GSC 08498-00945 * 03 11 10.13 -57 48 24.8     14.67     ~ 1 0
18 NGC 1252 15 * 03 11 10.7344242789 -57 44 38.013813196   12.59 11.47     ~ 3 0
19 V* TW Hor C* 03 12 33.1606201355 -57 19 17.571043687   7.93 5.71 3.78 2.40 C-N5IIIb: 126 0
20 HD 20286 * 03 13 02.5644242178 -57 50 01.847368656   9.17 9.16     B9.5V 16 0
21 HD 20544 * 03 15 32.6820232274 -57 49 17.747829026   9.88 8.71     K1III 9 0
22 Cl Melotte 25 OpC 04 26 54.00 +15 52 00.0           ~ 2695 0
23 NGC 1818 GlC 05 04 13.300 -66 26 05.47   9.7       ~ 238 0
24 HD 35183 * 05 17 23.0352254991 -68 28 19.085614238   9.30 9.16     A3V 31 0
25 NGC 1901 8 * 05 17 26.9375723907 -68 25 41.205083525   13.14 12.56     ~ 5 0
26 Cl* NGC 1901 PBD 2 * 05 17 27.5 -68 29 45     14.52     ~ 1 0
27 2MASS J05173121-6823507 * 05 17 31.2247035348 -68 23 50.721336096     14.99     ~ 1 0
28 2MASS J05173271-6823517 * 05 17 32.7170770716 -68 23 51.746323175     14.53     ~ 1 0
29 HD 35230 ** 05 17 35.5225517 -68 35 35.292960   8.44 7.59     G8III 33 0
30 HD 269301 * 05 17 35.8132977209 -68 21 47.139951855   11.21 10.89     F0 17 0
31 2MASS J05173775-6831514 * 05 17 37.7481773105 -68 31 51.417419405     15.22     ~ 1 0
32 MACS J0517-684 15 * 05 17 41 -68 29.1     13.6     ~ 2 0
33 RM 1-275 * 05 17 51.0646575877 -68 24 34.616257819 17.43 15.54 13.52 13.09 12.15 M: 4 0
34 2MASS J05175137-6826082 * 05 17 51.3675219605 -68 26 08.321114714     13.95     ~ 1 0
35 2MASS J05175649-6824223 * 05 17 56.4898662492 -68 24 22.351584902     14.71     ~ 1 0
36 HD 269310 * 05 17 59.1648665073 -68 31 27.671653396   10.72 10.46     A7V 19 0
37 HD 35294 * 05 18 03.2568354246 -68 27 56.654415598   9.14 8.40     G1/3(IV) 20 0
38 Cl* NGC 1901 PBD 1 * 05 18 04.0 -68 26 44     13.85     ~ 1 0
39 2MASS J05180943-6826267 * 05 18 09.4384635386 -68 26 26.735641584     15.63     ~ 1 0
40 NGC 1901 OpC 05 18 11 -68 27.0           ~ 79 0
41 2MASS J05181139-6826342 * 05 18 11.3967231434 -68 26 34.172265096     15.01     ~ 1 0
42 HD 269312 ** 05 18 11.9809851022 -68 25 36.310255325   10.65 10.38 10.45   A7 14 1
43 HD 269315 * 05 18 16.6813232851 -68 25 10.413847106   11.77 11.32 11.21   F5/8: 10 0
44 GSC 09162-00626 V* 05 18 19.1714890346 -68 26 25.138068302   12.5 12.9 12.25   ~ 6 0
45 HD 269319 * 05 18 22.4797334516 -68 28 01.613136369   10.46 10.23     A3 23 0
46 SK -68 67 * 05 18 27.5563605820 -68 31 28.339799838   12.36 12.370   12.349 OB 5 0
47 HD 269324 * 05 18 29.5249043464 -68 27 13.850456337   12.07 11.58     G5 10 0
48 2MASS J05183346-6830426 * 05 18 33.4662793973 -68 30 42.669432756     15.24     ~ 1 0
49 Cl* NGC 1901 PBD 3 * 05 18 36.5 -68 29 10     14.52     ~ 1 0
50 GSC 09162-00682 * 05 18 41.6885409230 -68 22 29.238953451     11.73 10.93   ~ 4 0
51 HD 269334 * 05 18 42.7372717444 -68 27 32.742029266   12.05 11.64     F0 14 0
52 2MASS J05190521-6830457 LP* 05 19 05.2058775594 -68 30 45.767214728   12.80 12.30 10.40   F8: 7 0
53 NGC 2004 Cl* 05 30 41.340 -67 17 21.83   9.6       ~ 265 0
54 NGC 2516 OpC 07 58 04 -60 45.2           ~ 595 0
55 Cl* NGC 1901 PBD 4 * 08 18 58.0 -68 21 25     16.12     ~ 1 0
56 NGC 2808 GlC 09 12 03.10 -64 51 48.6   7.77 5.69     ~ 1254 0
57 NGC 6752 GlC 19 10 52.11 -59 59 04.4   6.96 6.28     ~ 1817 0
58 M 73 Cl* 20 59.0 -12 38     8.9     ~ 32 0

    Equat.    Gal    SGal    Ecl

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2020.10.24-05:56:41

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