Notes for HD 209458

update: 27 May 2005

The planet(s):

Detection methods: Radial velocity (Mazeh et al., Henry et al.)

Basic data:

Name:	HD 209458 b
M.sini:	0.69 ± 0.05 M_J
Radius	1.32 ± 0.05 R_Jup
Temperature	1,130 ± 150 K
Semi-major axis:	0.045 AU
Orbital period:	3.52474541 ± 0.00000025 d.
Eccentricity:	0.0
Omega (deg):	83
T_peri (Mid-transit time - HJD):	2 452 854.825415 ± 0.000060
Inclination:	86.1 ± 0.1

Remarks:
22 Mar 05: Direct thermal emission found with Spitzer by Deming et al (2005)
4 Feb 04: Oxygen and Carbon detected in the atmosphere (Vidal-Madjar et al 2004)
Nov 01: Na detected in the planet atmosphere (Charbonneau et al 2001)
12 Mar. 03: Detection of an extended cometary-shaped atmosphere (Vidal Madjar et al 2003)
(Comment: the cometary shape was predicted in 1997 (Schneider et al 1998) - Reply)
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122. WITTENMYER R., WELSH W., OROSZ J., SCHULTZ A., KINZEL W., KOCHTE M., BRUHWEILER S., BENNUM D., HENRY G., MARCY G., FISCHER D., BUTLER P., & VOGT S., 2005
  System Parameters of the Transiting Extrasolar Planet HD 209458b.
  ApJ., submitted
  preprint
123. WITTENMYER R., WELSH W., OROSZ J., SCHULTZ A., KINZEL W., KOCHTE M., BRUHWEILER F., BENNUM D. & HENRY G., 2004
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  abstract
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125. WOREK T., 2000
  The Rossiter-McLaughlin rotation effect for HD 209458 due to a planetary transit.
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Other Web pages:
1. An extended upper atmosphere page (Institut d'Astrophysique de Paris)
2. Exoplanets.org News
3. Cometary tails of close-in giant planets (Schneider and Sekulic)
4. Planet atmosphere: press release, graphics and tutorials
5. HST transit light curve (Brown, Charbonneau et al)
6. HST-STIS Transit data (Brown et al 2001)
7. Upcoming transit times for HD 209458 (D. Charbonneau)
8. STARE web page (Charbonneau & Brown)
9. Multicolor photometric data (Jha et al, ApJ Let.,540, L45, 2000)
10. Geneva Observatory Web page
11. Marcy et al data
12. HD 209458 Planetary Transit (G. Henry)
13. Details on `Transit of a Planet Across HD 209458' (California and Carnegie Planet Search)
14. Transit at St-Andrews Univ.
15. Transit seen by the Vulcain camera (NASA/Ames)
16. Lightcurve by amateurs at Nyrola Observatory, Finland (Arto Oksanen and Marko Moilanen).
17. Animated transit (press reload to start again) based on real data (Deeg and Garrido)

The star:

Distance: 47 pc
Spectral type: G0V
Apparent magnitude: V = 7.65
Coordinates (2000): RA = 22 03 10.7, DEC = +18 53 04
Metallicity: [Fe/H]_sp = 0.04
Mass (M_sun): 1.05
Radius (R_sun): 1.12
More data:
- Basic Data (from simbad )
- Most recent refs. (from ADS; enter ` HD 209458 ' in the `objects' field)

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