RA = 02:49:44.6, Decl = +71:45:11
Season = Nov 09
B = 08.76, V = 08.17
HJDo = 4438.4835 ± 0.02
P = 21.21725 day
Depth = 6.2 ± 0.4 mmag (R-band)
Length = 3.10 ± 0.08 hr
This will be a difficult object to
observe because the depth is small (6 mmag) and the period is long and
uncertain (21.2 days). At least it's bright. So far it appears that the period should be shortened to 21.218 days.
Short et al (2008) published (http://fr.arxiv.org/abs/0803.2935)
a probable detection of planet "c" in an outer orbit that perturbs the
transiting plant's (plant "b") transit times by significant amounts.
Every 333 days the mid-transit times should "jump" about 3 minutes.
This should be observable using amateur telescopes provided several
transits are observed after the jump (or more than one observer
measures the same transit after a jump).
| # |
Date [yyyy.mm.dd] |
Filter |
Observer |
Depth [mmag] |
Length [hr] |
UT mid |
JD mid |
HJD mid | Ephem HJD |
dt [min] |
| 2007.12.25 |
BB |
Gary |
6.6 ± 0.6 | 3.08 ± 0.07 | 04.670 ± 0.035 | 4459.6946 |
4459.6978 | 4459.7008 |
-4.3 ± 2.1 | |
| 1 |
2007.10.01 |
C |
Levin |
6.5 ± 1.5 |
?.?? |
07.?? |
4374.82? |
4374.82? | 4374.8300 |
?.? |
Table of professional observations
| # |
Date |
Filter |
Senior Author |
Telescope |
Depth [mmag] |
Length [hr] |
HJD |
dt [min] |
| 2 |
||||||||
| 1 |
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WebMaster: Bruce L. Gary. Nothing on this web page is copyrighted. This site opened: October 04, 2007. Last Update: March 21, 2008