2016AJ....152....7H

Query : 2016AJ....152....7H

2016AJ....152....7H - Astron. J., 152, 7-7 (2016/July-0)

The putative old, nearby cluster Loden 1 does not exist.

HAN E., CURTIS J.L. and WRIGHT J.T.

Abstract (from CDS):

Astronomers have access to precious few nearby, middle-aged benchmark star clusters. Within 500 pc, there are only NGC 752 and Ruprecht 147 (R147) at 1.5 and 3 Gyr, respectively. The Database for Galactic Open Clusters (WEBDA) also lists Loden 1 as a 2 Gyr cluster at a distance of 360 pc. If this is true, Loden 1 could become a useful benchmark cluster. This work details our investigation of Loden 1. We assembled archival astrometry (PPMXL) and photometry (2MASS, Tycho-2, APASS), and acquired medium resolution spectra for radial velocity measurements with the Robert Stobie Spectrograph at the Southern African Large Telescope. We observed no sign of a cluster main-sequence turnoff or red giant branch among all stars in the field brighter than J\lt 11 . Considering the 29 stars identified by L.O. Loden and listed on SIMBAD as the members of Loden 1, we found no compelling evidence of kinematic clustering in proper motion or radial velocity. Most of these candidates are A stars and red giants, and their observed properties are consistent with distant field stars in the direction of Loden 1 in the Galactic plane. We conclude that the old nearby cluster Loden 1 is neither old, nor nearby, nor a cluster.

Abstract Copyright: © 2016. The American Astronomical Society. All rights reserved.

Journal keyword(s): open clusters and associations: general - open clusters and associations: individual: Loden 1

Simbad objects: 78

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Number of rows : 78
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NGC 188 OpC 00 47 14.8 +85 14 42           ~ 990 0
2 NGC 752 OpC 01 56 53.7 +37 45 06           ~ 712 0
3 HD 19467 PM* 03 07 18.5750514360 -13 45 42.417982152   7.65 7.00 7.79 8.82 G3V 197 0
4 NAME Chandra Deep Field-South reg 03 32 28.0 -27 48 30           ~ 2282 1
5 Cl Melotte 22 OpC 03 46 38.0 +24 10 41           ~ 3679 0
6 Cl Melotte 25 OpC 04 30 27.4 +16 46 43           ~ 3309 0
7 HD 35974 PM* 05 27 06.6547405704 -31 33 58.224141252   7.77 7.19     G1V 61 0
8 M 37 OpC 05 52 18.6 +32 32 36           ~ 436 0
9 HD 43745 PM* 06 17 03.5978753136 -22 42 54.831670740   6.63 6.04     F8.5V 92 0
10 HD 45184 PM* 06 24 43.8795895848 -28 46 48.415725948   7.01 6.39 6.24 8.94 G2Va 238 1
11 NGC 2240 OpC 06 33 10 +35 15.0           ~ 27 1
12 NGC 2451A OpC 07 42 55.4 -38 15 05           ~ 159 0
13 NGC 2451B OpC 07 44 22.6 -37 53 00           ~ 125 0
14 NGC 2451 Cl* 07 45.4 -37 58           ~ 165 1
15 HD 63754 ** 07 49 45.2643770400 -20 12 27.477787536   7.110 6.530     G0V 86 1
16 HD 68978 PM* 08 13 34.4987570641 -31 44 07.381786853   7.36 6.75     G0.5V 109 0
17 HD 71334 PM* 08 25 49.5155726353 -29 55 50.133816869   8.49 7.82     G2.5V 153 0
18 NGC 2632 OpC 08 39 58.4 +19 36 33           ~ 1733 0
19 NGC 2682 OpC 08 51 23.5 +11 48 54           ~ 2528 0
20 TYC 8603-710-1 * 10 02 27.7832230896 -55 44 33.391645512   11.72 11.37     ~ 2 0
21 2MASS J10025969-5556088 * 10 02 59.6956218816 -55 56 08.798095644           ~ 1 0
22 HD 300433 * 10 03 00.1249746576 -55 46 35.891357376   10.27 10.08     A2 5 0
23 TYC 8603-1152-1 * 10 03 02.3524742064 -55 39 18.205440768   11.37 11.04     ~ 1 0
24 2MASS J10030948-5537066 * 10 03 09.4807557336 -55 37 06.683137824           ~ 1 0
25 HD 300430 * 10 03 23.3502740880 -55 32 19.682542572   10.68 10.40     A2 4 0
26 Cl Loden 1 25 * 10 03 36.9638517432 -55 52 04.017537696 12.87 12.77 12.54     A5 2 0
27 HD 87492 * 10 03 39.6461344608 -55 43 10.236026784 9.10 8.85 8.61     A3III/IV 8 0
28 CPD-55 2855 * 10 03 44.2590626760 -55 52 35.184517716 12.36 12.24 11.86     A6 3 0
29 CPD-55 2856 SB* 10 03 48.1819535856 -55 54 34.991786988 12.44 12.06 11.25     K0 6 0
30 TYC 8603-1758-1 * 10 03 50.3607500083 -56 12 33.286492000   11.27 10.75     ~ 1 0
31 CPD-55 2858 SB* 10 03 50.7087405360 -55 55 13.468667448 12.03 11.74 11.40     A2 6 0
32 HD 87541 * 10 04 01.1907627648 -55 54 29.544868512 7.73 7.99 8.02     B9III/IV 21 0
33 CPD-55 2863 * 10 04 02.3298256680 -55 50 00.342242952 12.76 12.08 11.09     K2 5 0
34 TYC 8603-1619-1 * 10 04 05.3758130256 -55 31 47.612968356   12.63 12.19     ~ 1 0
35 Cl Loden 1 23 Y*? 10 04 14.5263710786 -55 45 25.108032294 12.96 12.92 12.32     G0 6 0
36 Cl Loden 1 21 * 10 04 18.1632213504 -55 46 55.993523484 12.79 12.73 12.29     F4 2 0
37 HD 300469 * 10 04 21.0017755080 -55 53 59.727489720 11.21 10.98 10.50     F2 5 0
38 HD 300468 * 10 04 27.1848135240 -55 50 58.291463616 12.24 11.33 10.26     K0 9 0
39 Cl Loden 1 26 * 10 04 30.7647207504 -55 44 44.659215276 13.16 13.03 12.70     A6 7 0
40 Cl Loden 1 24 * 10 04 36.1933621200 -55 42 25.872321600 12.84 12.72 12.43     A3 2 0
41 BM VIII 8 * 10 04 38.4646490712 -55 54 39.609486288 16.43 14.60 12.09     M2/3 5 0
42 CD-55 3105 * 10 04 40.3266919656 -55 54 36.766338300 13.39 11.99 10.70     K 5 0
43 Cl Loden 1 19 * 10 04 42.3968176920 -55 47 25.571659668 14.18 13.21 12.05     K5 8 0
44 TYC 8603-1345-1 * 10 04 49.2683925288 -55 37 53.253102396   12.38 11.10     ~ 1 0
45 CD-55 3109 * 10 04 50.8222604208 -55 50 04.123221432 12.26 11.25 10.10     K3 11 0
46 CPD-55 2875 * 10 04 57.2618146175 -55 55 49.441569925 12.40 12.111 11.867 11.900   A5 5 0
47 HD 87677 * 10 04 57.8040109512 -55 48 02.114853876 8.92 8.86 8.81     A0IV 12 0
48 Cl Loden 1 18 * 10 05 01.9017888672 -55 44 04.465470840 13.81 13.09 12.03     K2 6 0
49 Cl Loden 1 22 * 10 05 03.6002600760 -55 50 46.809334104 12.95 12.72 12.32     A6 6 0
50 Cl Loden 1 27 * 10 05 04.3670154864 -55 53 59.257989132 13.38 13.34 12.71     G0 2 0
51 Cl Loden 1 29 * 10 05 04.4662198080 -55 54 30.805630020 13.64 13.59 12.99     G0 2 0
52 Cl Loden 1 28 * 10 05 04.5516471624 -55 49 54.514364232 13.36 13.28 12.74     G0 2 0
53 HD 87699 * 10 05 04.6020315360 -55 46 02.842796100 11.43 9.57 7.99     K4III 13 0
54 2MASS J10051003-5534550 * 10 05 10.0332874464 -55 34 55.064700732           ~ 1 0
55 HD 87698 * 10 05 10.2194391600 -55 41 13.425576900 10.25 10.18 9.70     F0/2V 7 0
56 Cl Loden 1 err 10 05 14 -55 48.3           ~ 25 0
57 2MASS J10051941-5546252 * 10 05 19.4071207488 -55 46 25.325291388           ~ 3 0
58 2MASS J10052049-5555298 * 10 05 20.4948544200 -55 55 29.832482532           ~ 1 0
59 CD-55 3114 * 10 05 20.7799966896 -55 47 03.819456672 12.61 11.74 10.65     K4 8 0
60 CD-55 3116 LP? 10 05 32.4352770432 -55 46 39.323905752 13.66 12.00 10.32     M5 7 0
61 CD-55 3117 * 10 05 34.8670542792 -55 40 04.775247444 10.97 11.17 11.13     B8/9 5 0
62 TYC 8603-1584-1 * 10 05 38.5996979664 -55 50 33.560095452   12.42 11.57     ~ 5 0
63 TYC 8603-1869-1 * 10 05 42.2042293176 -55 53 00.894359616   11.48 11.31     ~ 3 0
64 TYC 8603-1718-1 * 10 05 50.5916826312 -55 42 33.567950016   12.54 12.47     ~ 1 0
65 TYC 8603-1813-1 * 10 05 53.8467947376 -55 43 41.147544864   13.28 11.72     ~ 1 0
66 HD 300463 * 10 05 58.9534762464 -55 42 01.470521772   10.70 10.55     A0 4 0
67 HD 300467 * 10 06 01.3762304016 -55 47 23.142283656   10.48 10.50     A0 5 0
68 TYC 8603-1692-1 * 10 06 03.2821972248 -55 53 12.659775972   13.17 12.42     ~ 1 0
69 TYC 8603-1458-1 * 10 06 05.7547516296 -56 04 07.681174554   12.40 11.47     ~ 1 0
70 TYC 8603-1226-1 * 10 06 09.1958712312 -55 33 40.388630688   11.31 10.83     ~ 1 0
71 TYC 8603-849-1 * 10 06 10.6599141048 -55 47 15.692461692   12.96 11.78     ~ 1 0
72 TYC 8603-1034-1 * 10 06 37.9844353440 -55 41 20.360010948   11.88 11.39     ~ 1 0
73 2MASS J10065383-5539223 * 10 06 53.8343074416 -55 39 22.224378312           ~ 1 0
74 NGC 6774 OpC 19 16 17.6 -16 20 45           ~ 258 0
75 NGC 6791 OpC 19 20 52.8 +37 46 40   10.52 9.5     ~ 1120 0
76 NGC 6811 OpC 19 37 21.8 +46 22 43   7.47 6.8     ~ 435 0
77 NGC 6819 OpC 19 41 18.3 +40 11 19   8.21 7.3     ~ 719 0
78 NGC 6866 OpC 20 03 57.7 +44 10 22   8.04 7.6     ~ 185 0

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