results

NGTS-8 b

Total Reductions to Date: 2

Date Processed: 09/06/2025 at 07:00:04 (PDT)

Exoplanet Watch Ephemeris

Parameter Value Uncertainty
Orbital Period (Days) - -
Ephemeris (BJD_TDB) - -
Time saved (hours) -  

Assumed Priors

Parameter Value Uncertainty Units Reference
RA 328.9759206 decimal
DEC -14.0684399 decimal
Host Star Metallicity 0.24 0.09 Costes et al. 2020
Host Star log(g) 4.41 0.03 Log10(cgs) Costes et al. 2020
Host Star Radius [R_Sun] 0.98 0.02 Sol Costes et al. 2020
Host Star Effective Temperature [K] 5241.0 50.0 K Costes et al. 2020
a/Rs 7.6 0.18 Costes et al. 2020
eccentricity 0.01 0.014 Costes et al. 2020
inclination [degrees] 86.9 0.5 deg Costes et al. 2020
omega [degrees] 0.0 deg Costes et al. 2020
orbital period [days] 2.4997 1e-05 day Costes et al. 2020
Rp 12.22 0.34 R_Earth Costes et al. 2020
Rp/Rs 0.1143 0 Costes et al. 2020
ephemeris [JD] 2457500.1783 0.00072 BJD Costes et al. 2020

Previously Published Mid-Transit Times

Value Uncertainty Units Reference
2457500.1783 0.00072 BJD Costes et al. 2020

Observations

Light curve chart for 0010656
Parameter Value Uncertainty
Am1 1.124 0.023
Am2 -0.086 0.018
a/Rs 7.44 0.51
Rp/Rs 0.0 0.014
ephemeris [JD] 2460124.848 0.012
eccentricity 0.01
inclination [degrees] 86.9
omega [degrees] 0.0
orbital period [days] 2.4997
u0 2.340634194470059
u1 -4.0798485583207285
u2 4.197726706926731
u3 -1.4585122805250594
duration 0.0984 0.0082
Not included in ephemeris calculations
Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )
Filter Detail Min Max
NA Custom 697.0 nm 827.0 nm
Organization Observer Code Secondary Observers
AAVSO JDOC (collaborate/publish)
Light curve chart for 0004423
Parameter Value Uncertainty
Am1 0.961 0.013
Am2 0.0245 0.0041
a/Rs 7.41 0.52
Rp/Rs 0.0 0.012
ephemeris [JD] 2460194.835 0.013
eccentricity 0.01
inclination [degrees] 86.9
omega [degrees] 0.0
orbital period [days] 2.4997
u0 1.586373828846218
u1 -2.735048143917643
u2 3.3533231394174066
u3 -1.2046487743775725
duration 0.0991 0.0083
Not included in ephemeris calculations
Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )
Filter Detail Min Max
V Johnson V 502.8 nm 586.8 nm
Organization Observer Code Secondary Observers
AAVSO CCHD (collaborate/publish)