2004AJ....127.2344J


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.12CEST14:52:56

2004AJ....127.2344J - Astron. J., 127, 2344-2351 (2004/April-0)

The history of the mysterious eclipses of KH 15D: Asiago observatory, 1967-1982.

JOHNSON J.A. and WINN J.N.

Abstract (from CDS):

We are gathering archival observations to determine the photometric history of the unique and unexplained eclipses of the pre-main-sequence star KH 15D. Here we present a light curve from 1967 to 1982, based on photographic plates from Asiago Observatory. During this time, the system alternated periodically between bright and faint states, as observed today. However, the bright state was 0.9 mag brighter than the modern value, and the fractional variation between bright and faint states (ΔI=0.7 mag) was smaller than observed today (3.5 mag). A possible explanation for these findings is that the system contains a second star that was previously blended with the eclipsing star but is now completely obscured.

Abstract Copyright:

Journal keyword(s): Stars: Circumstellar Matter - Galaxy: Open Clusters and Associations: Individual: NGC Number: NGC 2264 - stars: individual (KH 15D) - Stars: Pre-Main-Sequence - Techniques: Photometric

Simbad objects: 57

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Number of rows : 57

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 Cl* NGC 2264 FMS 2-349 * 06 40 38.0263802452 +09 32 49.216736514   18.67 17.27     M1 7 0
2 CSIMon-001192 TT* 06 40 38.7780845985 +09 21 38.323817814   16.39 15.429     K3 11 0
3 Cl* NGC 2264 FMS 128 * 06 40 39.2860856116 +09 21 01.767342376   16.824 15.784     ~ 3 0
4 NGC 2264 85 TT* 06 40 42.4450078194 +09 32 20.593980696 17.198 16.443 15.257 14.63 13.986 K4 28 0
5 Cl* NGC 2264 FMS 165 * 06 40 42.7591491637 +09 23 49.055730323   14.901 14.236     G3 5 0
6 V* V598 Mon Or* 06 40 43.4278719643 +09 28 40.950294555   17.952 16.68 15.64 14.54 M0 28 0
7 Cl* NGC 2264 FMS 195 * 06 40 45.2049045766 +09 23 54.627767105   15.481 14.534     ~ 9 0
8 Cl* NGC 2264 FMS 208 Em* 06 40 46.8279970410 +09 25 53.648743386   17 15.567   13.76 F4 8 0
9 Cl* NGC 2264 LBM 5078 * 06 40 48.8728665695 +09 23 31.361732207   16.557 15.525   14.22 ~ 6 0
10 EM* LkHA 35 Or* 06 40 53.6365617652 +09 33 24.733966714 16.095 15.43 14.42 14.07 13.386 K1V 58 0
11 NGC 2264 120 PM* 06 40 55.4873903375 +09 31 21.819651505 16.874 15.641 14.172 13.39 12.456 M1 18 0
12 V* OO Mon A * 06 40 56.7571900075 +09 30 15.206761751     15.99 14.95 13.65 ~ 14 0
13 V* OO Mon Or* 06 40 56.768544 +09 30 15.10812 18.476 17.20 15.82 15.30 13.782 M3V 31 0
14 V* OO Mon B * 06 40 56.8289849856 +09 30 14.401286064     16.06 14.99 13.69 ~ 14 0
15 Cl* NGC 2264 FMS 289 * 06 40 57.8263175234 +09 19 27.919883276   18.62 17.04   14.88 ~ 5 0
16 NGC 2264 OpC 06 40 58 +09 53.7     3.9     ~ 1588 1
17 EM* LkHA 42 Or* 06 40 58.6730868174 +09 36 13.170405288   18.43 17.40 15.97 14.29 M4 29 0
18 V* V421 Mon Or* 06 40 59.5445496967 +09 35 10.865366091 18.354 16.73 15.15 14.46 13.214 K4 47 0
19 V* V605 Mon Or* 06 41 01.4158456239 +09 34 08.184158463 16.672 15.84 14.69 14.05 13.280 K5 40 0
20 V* V781 Mon Or* 06 41 02.5373573590 +09 34 55.803651605 15.853 15.36 14.35 13.67 13.169 G7 35 0
21 NGC 2264 148 * 06 41 02.5892160243 +09 34 19.024050449 14.413 14.28 13.59   12.906 G5 14 0
22 Cl* NGC 2264 FMS 338 * 06 41 04.0215883336 +09 23 32.960818159   14.82 14.41     G3 19 0
23 V* LY Mon Or* 06 41 04.2795887837 +09 24 52.182724054   16.16 15.79 15.03 14.10 M1 45 0
24 2MASS J06410455+0925183 TT* 06 41 04.5553904513 +09 25 18.349437207   18.43 17.25 16.09 14.46 M3.6 17 0
25 NGC 2264 162 TT* 06 41 05.7406766259 +09 31 01.203664346 17.268 16.744 15.407 14.51 13.515 M1V 40 0
26 EM* LkHA 55 Or* 06 41 06.4289866662 +09 28 38.843865251   19.00 17.30 16.27 15.15 M1.5 27 0
27 V* V428 Mon Or* 06 41 07.3472058738 +09 25 55.011499992   16.45 15.15 14.55 13.52 K4V 29 0
28 V* LZ Mon Or* 06 41 08.8340264593 +09 23 43.076755543   16.01 14.73 14.06 13.09 K4V 26 0
29 V* OR Mon Or* 06 41 09.092352 +09 30 09.07524 18.311 17.797 16.407 15.49 14.404 K7 37 0
30 HD 47887 pr* 06 41 09.5990835362 +09 27 57.540646250 6.01 6.96 7.14   7.40 B2III: 98 0
31 V* V818 Mon Or* 06 41 09.8296745515 +09 27 12.242480096   15.74 14.50 13.67 12.91 K4V 31 0
32 V* V582 Mon Or* 06 41 10.3403654169 +09 28 33.490089193   17.404   17.21 16.45 K5 165 0
33 V* OS Mon Or* 06 41 13.3333397177 +09 28 07.462312367   17.92 16.77 15.53 14.97 K7V 34 0
34 NGC 2264 191 TT* 06 41 14.4638050608 +09 33 21.420141502 17.892 16.777 15.453 14.56 13.799 K4V 40 0
35 Cl* NGC 2264 SBL 336 TT* 06 41 14.8404264924 +09 32 35.850841705 20.085 18.653 16.992 15.75 14.191 M3e 26 0
36 V* MN Mon Or* 06 41 16.7841573895 +09 27 30.211208968   16.09 15.13 14.33 13.64 K4 42 0
37 V* OU Mon Or* 06 41 17.7099274973 +09 29 26.207805071 18.505 17.259 15.742 14.71 13.495 M3V 29 0
38 2MASS J06411792+0933370 TT* 06 41 17.9262839123 +09 33 37.023137743 17.691 16.651 15.364 14.64 13.722 M0 30 0
39 EM* LkHA 68 Or* 06 41 18.2762254109 +09 33 53.577554167 16.211 15.98 14.926 14.25 13.556 K4 53 0
40 V* PX Mon Or* 06 41 19.1160918993 +09 26 29.468247701   18.26   16.41 15.10 M3 23 0
41 CSIMon-000530 TT* 06 41 19.3839928906 +09 21 46.986144424   16.307 15.385     ~ 10 0
42 NGC 2264 454 TT* 06 41 19.4545112058 +09 30 28.630267070 15.398 14.779 13.882 13.39 12.930 K5 21 0
43 2MASS J06411963+0931443 TT* 06 41 19.6324748405 +09 31 44.376104525 16.619 15.613 14.400 13.77 12.942 K4V 31 0
44 V* OV Mon Or* 06 41 21.0098817834 +09 33 36.095306948 16.616 16.324 15.104 14.38 13.514 K4V 50 0
45 IRAS 06385+0924 TT* 06 41 22.1445258428 +09 21 31.115121957   18.234 16.811   14.24 ~ 12 0
46 Cl* NGC 2264 FMS 2-1517 * 06 41 22.5367066851 +09 29 12.942839314 16.136 15.003 13.863   12.648 K4 12 0
47 CSIMon-000559 TT* 06 41 24.2542490023 +09 31 54.151566726 17.667 16.764 15.420 14.72 14.003 K4 27 0
48 Cl* NGC 2264 FMS 451 * 06 41 24.3927300768 +09 21 39.000999012   13.842 13.290     ~ 8 0
49 CSIMon-000555 TT* 06 41 24.4535589937 +09 32 45.160412151 19.571 18.229 16.650 15.25 14.316 M5V 25 0
50 2MASS J06412473+0926233 TT* 06 41 24.7296037602 +09 26 23.481325503   14.154 13.394 12.95 12.53 G7 19 0
51 V* V978 Mon Or* 06 41 27.1549266249 +09 35 06.146779821 15.936 15.326 14.280 13.73 13.133 K1 29 0
52 2MASS J06412756+0931558 TT* 06 41 27.564 +09 31 55.83 19.200 16.377 15.081   14.057 K4 14 0
53 Cl* NGC 2264 FMS 463 * 06 41 27.9371717891 +09 21 39.611606647   14.07 13.442     ~ 4 0
54 Cl* NGC 2264 FMS 481 El* 06 41 36.8299196185 +09 27 05.642847586   15.784 14.674 14.27 13.31 K6 9 0
55 Cl* NGC 2264 FMS 504 * 06 41 42.4897106708 +09 28 02.149976380   15.11 14.36     G7 5 0
56 V* V371 Mon Or* 06 41 44.3340691298 +09 22 38.111942858   16.34 15.31 14.87   ~ 3 0
57 Cl* NGC 2264 FMS 515 * 06 41 45.9789944900 +09 23 50.459721671   13.88 13.32     ~ 5 0

    Equat.    Gal    SGal    Ecl

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2020.07.12-14:52:56

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