Epsilon Aurigae Campaign 2009
Star System Information
Epsilon
Aurigae, 7 Epsilon Aurigae
HR1605 * HD31964 * SAO 39955
Name: Almaaz * Part of "The Kids"
R.A.
(2000) 05h 01m 58.1s * DEC. (2000) +43d 49' 24"
Distance:
625 pc
Orbital Radius ~27.6 AU
Epoch:
JD 2,435,624/JD 2,435,629
Period: 9885 days 27.1 years Secondary
Eclipse at Phase: ?
Ingress/Egress:
394 days
Total Eclipse: 647 Days
Totality: 446 days
2,455,050 - Year 2009
Contact
Times are for B Band Data
1st
Contact
JD 2,455,055 * 11 Aug 2009 (Tuesday)
2nd Contact
JD 2,455,185 * 19 Dec 2009 (Saturday)
Mid-Eclipse
JD 2455413 * 04 Aug 2010 (Wednesday)
3rd Contact
JD 2,455,640 * 19 Mar 2011 (Saturday)
4th Contact
JD 2,455,695 * 13 May 2011
(Friday)
Note:
Dates are approximate. Because of the out-of-eclipse variability of Epsilon
Aurigae exact dates are ambiguous.
It appears that the eclipse may start earlier at long wavelengths, two weeks
or more. For details see the
Predictions Page.
Secondary Eclipse: ?
Max Separation Date: 2016
| Component |
A
|
B
|
| Spectral Type |
FOIae
|
B5
?
|
| Diameter |
150s
|
1500s
|
| Mass |
15s
|
14s
|
| Luminosity |
?
|
?
|
| Absolute Magnitude |
?
|
?
|
| Magnitude |
?
|
?
|
| Temperature |
?
|
?
|
Epsilon Aurigae
Photometric Magnitudes
|
H
|
1.80
|
*
|
*
|
*
|
|
J
|
1.78
|
*
|
*
|
*
|
|
Rj
|
2.44
|
*
|
R
- I
|
+0.44
|
|
Ij
|
2.00
|
*
|
V
- I
|
+0.9
|
|
V
|
2.99
|
*
|
*
|
*
|
|
B
|
3.53
|
*
|
B
- V
|
+0.54
|
|
U
|
3.86
|
*
|
U
- B
|
+0.33
|
Note:
Magnitudes are average out-of-eclipse
Comparison
Star
Data
Lambda
Aurigae
SAO40233
HR1729
HD34411
R.A.
(2000)
05h 19m 08.4s
DEC. (2000)
+40d 05' 57"
|
H
|
3.33 | V | 4.71 | |
| J | 3.62 | B | 5.34 | |
|
Ij Ic |
3.88 4.00 |
U | 5.46 | |
|
Rj Rc |
4.19 4.30 |
Created 31 May 2006
Modified 20 November 2009
