results

HAT-P-39 b

Total Reductions to Date: 20

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

Exoplanet Watch Ephemeris

Parameter	Value	Uncertainty
Orbital Period (Days)	3.543874025440636	3.675613065657638e-07
Ephemeris (BJD_TDB)	2459907.9279014724	0.00021114798454108732
Time saved (hours)	-

Assumed Priors

Parameter	Value	Uncertainty	Units	Reference
RA	113.7582526		decimal
DEC	17.8300283		decimal
Host Star Metallicity	0.19	0.1		Kokori et al. 2023
Host Star log(g)	4.16	0.03	Log10(cgs)	Kokori et al. 2023
Host Star Radius [R_Sun]	1.625	0.081	Sol	Kokori et al. 2023
Host Star Effective Temperature [K]	6430.0	100.0	K	Kokori et al. 2023
a/R_s	6.74	0.25		Kokori et al. 2023
eccentricity	0.17			Bonomo et al. 2017
inclination [degrees]	87.0	1.0	deg	Kokori et al. 2023
omega [degrees]	0.0		deg	Kokori et al. 2023
orbital period [days]	3.5438737	3.4e-07	day	Kokori et al. 2023
R_p	19.12	0.95	R_Earth	ExoFOP-TESS TOI
R_p/R_s	0.1044	0		ExoFOP-TESS TOI
ephemeris [JD]	2458089.92057	0.00019	BJD-TDB	Kokori et al. 2023

Previously Published Mid-Transit Times

Value	Uncertainty	Units	Reference
2455208.750875	0.00041	BJD-TDB, BJD-UTC	Bonomo et al. 2017, Hartman et al. 2012
2458089.92057	0.00019	BJD-TDB	Kokori et al. 2023
2459500.382137	0.00029156	BJD	ExoFOP-TESS TOI

Observations

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Parameter	Value	Uncertainty
Am1	1.0046	0.0047
Am2	-0.0033	0.0017
a/R_s	6.68	0.16
R_p/R_s	0.0954	0.0037
ephemeris [JD]	2459907.9271	0.002
eccentricity	0.17
inclination [degrees]	87.0
omega [degrees]	0.0
orbital period [days]	3.5438737
u0	1.957490410528624
u1	-3.497544223530989
u2	4.070693404462621
u3	-1.530639530802198
duration	0.1743	0.0047

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)

Light curve chart for 83a220c704a2fdfcd3a15e02c61c56cd

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Parameter	Value	Uncertainty
Am1	1.0003	0.003
Am2	0
a/R_s	6.85	0.11
R_p/R_s	0.0982	0.0017
ephemeris [JD]	2459564.1713	0.0014
eccentricity	0.17
inclination [degrees]	87.0
omega [degrees]	0.0
orbital period [days]	3.5438737
u0	2.885658015416247
u1	-5.201793240909927
u2	5.05337694133431
u3	-1.737241640539445
duration	0.17	0.0031

Included in ephemeris calculations

Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )

Filter	Detail	Min	Max
I	Cousins I	721.0 nm	875.0 nm

Organization	Observer Code	Secondary Observers
EPW	TESS (collaborate/publish)

Light curve chart for 760ec3c68f03647ba4a4f052fecb8545

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Parameter	Value	Uncertainty
Am1	1.0002	0.0028
Am2	0
a/R_s	6.59	0.12
R_p/R_s	0.0966	0.0017
ephemeris [JD]	2459518.1019	0.0015
eccentricity	0.17
inclination [degrees]	87.0
omega [degrees]	0.0
orbital period [days]	3.5438737
u0	2.8859588351878127
u1	-5.202032185135702
u2	5.052974694863711
u3	-1.7369012696206312
duration	0.1775	0.0037

Included in ephemeris calculations

Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )

Filter	Detail	Min	Max
I	Cousins I	721.0 nm	875.0 nm

Organization	Observer Code	Secondary Observers
EPW	TESS (collaborate/publish)

Light curve chart for 47703429958ad6a10208bce91f8ab66c

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Parameter	Value	Uncertainty
Am1	1.0001	0.0029
Am2	0
a/R_s	6.816	0.097
R_p/R_s	0.0984	0.0015
ephemeris [JD]	2459557.083	0.0012
eccentricity	0.17
inclination [degrees]	87.0
omega [degrees]	0.0
orbital period [days]	3.5438737
u0	2.8864165934628043
u1	-5.204235809300454
u2	5.056142635873291
u3	-1.7383233446932453
duration	0.1712	0.0027

Included in ephemeris calculations

Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )

Filter	Detail	Min	Max
I	Cousins I	721.0 nm	875.0 nm

Organization	Observer Code	Secondary Observers
EPW	TESS (collaborate/publish)

Light curve chart for 63b9fe038dae3b1527c17c8071935ba8

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Parameter	Value	Uncertainty
Am1	1.0	0.0031
Am2	0
a/R_s	6.61	0.11
R_p/R_s	0.0978	0.0018
ephemeris [JD]	2459574.8061	0.0015
eccentricity	0.17
inclination [degrees]	87.0
omega [degrees]	0.0
orbital period [days]	3.5438737
u0	2.8840334956766913
u1	-5.197318884927381
u2	5.048788037334878
u3	-1.7355025728513835
duration	0.1764	0.0032

Included in ephemeris calculations

Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )

Filter	Detail	Min	Max
I	Cousins I	721.0 nm	875.0 nm

Organization	Observer Code	Secondary Observers
EPW	TESS (collaborate/publish)

Light curve chart for 236dbb65e5e58d4ebdde4729a116c04d

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Parameter	Value	Uncertainty
Am1	1.0	0.003
Am2	0
a/R_s	6.83	0.12
R_p/R_s	0.0964	0.0019
ephemeris [JD]	2459560.6296	0.0014
eccentricity	0.17
inclination [degrees]	87.0
omega [degrees]	0.0
orbital period [days]	3.5438737
u0	2.885505058146555
u1	-5.200696535336103
u2	5.051681148282987
u3	-1.7364895958175235
duration	0.1705	0.0035

Included in ephemeris calculations

Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )

Filter	Detail	Min	Max
I	Cousins I	721.0 nm	875.0 nm

Organization	Observer Code	Secondary Observers
EPW	TESS (collaborate/publish)

Light curve chart for 663f7f40d326e25657bd4a2ca9cd3aeb

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Parameter	Value	Uncertainty
Am1	1.0001	0.0027
Am2	0
a/R_s	6.73	0.1
R_p/R_s	0.0981	0.0016
ephemeris [JD]	2459546.4527	0.0013
eccentricity	0.17
inclination [degrees]	87.0
omega [degrees]	0.0
orbital period [days]	3.5438737
u0	2.8859500549738866
u1	-5.202336370635045
u2	5.053669573898803
u3	-1.7372831829320998
duration	0.1735	0.0029

Included in ephemeris calculations

Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )

Filter	Detail	Min	Max
I	Cousins I	721.0 nm	875.0 nm

Organization	Observer Code	Secondary Observers
EPW	TESS (collaborate/publish)

Light curve chart for 1ea30de821c37e5565ccd1bb872923c3

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Parameter	Value	Uncertainty
Am1	1.0001	0.003
Am2	0
a/R_s	6.6	0.12
R_p/R_s	0.0974	0.0018
ephemeris [JD]	2459549.9967	0.0015
eccentricity	0.17
inclination [degrees]	87.0
omega [degrees]	0.0
orbital period [days]	3.5438737
u0	2.8844787647755825
u1	-5.197380893294737
u2	5.047841390882726
u3	-1.7349391871448732
duration	0.1772	0.0036

Included in ephemeris calculations

Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )

Filter	Detail	Min	Max
I	Cousins I	721.0 nm	875.0 nm

Organization	Observer Code	Secondary Observers
EPW	TESS (collaborate/publish)

Light curve chart for b379a1ca7a1738d442eeae516c96c031

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Parameter	Value	Uncertainty
Am1	1.0003	0.0032
Am2	0
a/R_s	6.78	0.14
R_p/R_s	0.0977	0.0019
ephemeris [JD]	2459503.9263	0.0017
eccentricity	0.17
inclination [degrees]	87.0
omega [degrees]	0.0
orbital period [days]	3.5438737
u0	2.8847162845652212
u1	-5.199728090131843
u2	5.051609310021593
u3	-1.7365974291801276
duration	0.1715	0.004

Included in ephemeris calculations

Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )

Filter	Detail	Min	Max
I	Cousins I	721.0 nm	875.0 nm

Organization	Observer Code	Secondary Observers
EPW	TESS (collaborate/publish)

Light curve chart for f8c4383097ae118cb7edc8d840fca497

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Parameter	Value	Uncertainty
Am1	1.0005	0.003
Am2	0
a/R_s	6.8	0.14
R_p/R_s	0.0911	0.002
ephemeris [JD]	2459511.0103	0.0017
eccentricity	0.17
inclination [degrees]	87.0
omega [degrees]	0.0
orbital period [days]	3.5438737
u0	2.886068671826645
u1	-5.203414547009197
u2	5.055437325333478
u3	-1.7380913748190396
duration	0.1702	0.0039

Included in ephemeris calculations

Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )

Filter	Detail	Min	Max
I	Cousins I	721.0 nm	875.0 nm

Organization	Observer Code	Secondary Observers
EPW	TESS (collaborate/publish)

Light curve chart for 8c47f7a48e576e61c922b35d3401eb25

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Parameter	Value	Uncertainty
Am1	1.0002	0.0031
Am2	0
a/R_s	6.66	0.12
R_p/R_s	0.0955	0.0018
ephemeris [JD]	2459571.2589	0.0015
eccentricity	0.17
inclination [degrees]	87.0
omega [degrees]	0.0
orbital period [days]	3.5438737
u0	2.8863160955370475
u1	-5.203640093363071
u2	5.055203334732728
u3	-1.7378792615783043
duration	0.1745	0.0037

Included in ephemeris calculations

Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )

Filter	Detail	Min	Max
I	Cousins I	721.0 nm	875.0 nm

Organization	Observer Code	Secondary Observers
EPW	TESS (collaborate/publish)

Light curve chart for 8fc6aec0104549ceade974ca1dd8b5c9

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Parameter	Value	Uncertainty
Am1	1.0007	0.0035
Am2	0
a/R_s	7.11	0.17
R_p/R_s	0.0885	0.0025
ephemeris [JD]	2459500.3867	0.0018
eccentricity	0.17
inclination [degrees]	87.0
omega [degrees]	0.0
orbital period [days]	3.5438737
u0	2.8867528338728734
u1	-5.204987835400336
u2	5.0567660215363075
u3	-1.7385309446571595
duration	0.161	0.0045

Included in ephemeris calculations

Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )

Filter	Detail	Min	Max
I	Cousins I	721.0 nm	875.0 nm

Organization	Observer Code	Secondary Observers
EPW	TESS (collaborate/publish)

Light curve chart for e2233a73b530e91a91c92559e5703263

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Parameter	Value	Uncertainty
Am1	1.0002	0.003
Am2	0
a/R_s	6.81	0.11
R_p/R_s	0.0995	0.0017
ephemeris [JD]	2459521.6478	0.0014
eccentricity	0.17
inclination [degrees]	87.0
omega [degrees]	0.0
orbital period [days]	3.5438737
u0	2.8851980289559775
u1	-5.2011030451869695
u2	5.053152323334563
u3	-1.7372472318057341
duration	0.1712	0.0032

Included in ephemeris calculations

Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )

Filter	Detail	Min	Max
I	Cousins I	721.0 nm	875.0 nm

Organization	Observer Code	Secondary Observers
EPW	TESS (collaborate/publish)

Light curve chart for 28bdf72ea75ac0657db857eb7cefe495

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Parameter	Value	Uncertainty
Am1	1.0002	0.0028
Am2	0
a/R_s	6.69	0.12
R_p/R_s	0.0973	0.0019
ephemeris [JD]	2459528.7338	0.0015
eccentricity	0.17
inclination [degrees]	87.0
omega [degrees]	0.0
orbital period [days]	3.5438737
u0	2.885198005024491
u1	-5.200522875929358
u2	5.052129020440921
u3	-1.736804074253465
duration	0.1745	0.0035

Included in ephemeris calculations

Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )

Filter	Detail	Min	Max
I	Cousins I	721.0 nm	875.0 nm

Organization	Observer Code	Secondary Observers
EPW	TESS (collaborate/publish)

Light curve chart for d2b769074d92829d512d1b93087bd5b4

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Parameter	Value	Uncertainty
Am1	1.0	0.0028
Am2	0
a/R_s	6.97	0.13
R_p/R_s	0.1003	0.0018
ephemeris [JD]	2459542.9081	0.0015
eccentricity	0.17
inclination [degrees]	87.0
omega [degrees]	0.0
orbital period [days]	3.5438737
u0	2.8849038924990102
u1	-5.198953941692482
u2	5.049742439334419
u3	-1.7356923148939218
duration	0.1675	0.0035

Included in ephemeris calculations

Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )

Filter	Detail	Min	Max
I	Cousins I	721.0 nm	875.0 nm

Organization	Observer Code	Secondary Observers
EPW	TESS (collaborate/publish)

Light curve chart for d528ad2db7896c24b3a155af5064d81b

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Parameter	Value	Uncertainty
Am1	0.9998	0.0029
Am2	0
a/R_s	6.84	0.11
R_p/R_s	0.0985	0.0016
ephemeris [JD]	2459514.5581	0.0014
eccentricity	0.17
inclination [degrees]	87.0
omega [degrees]	0.0
orbital period [days]	3.5438737
u0	2.8853334975333387
u1	-5.200677505316152
u2	5.0519727240340995
u3	-1.7366286409710265
duration	0.1705	0.0031

Included in ephemeris calculations

Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )

Filter	Detail	Min	Max
I	Cousins I	721.0 nm	875.0 nm

Organization	Observer Code	Secondary Observers
EPW	TESS (collaborate/publish)

Light curve chart for 85adda173772d2b6456f31adf186b1df

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Parameter	Value	Uncertainty
Am1	1.0	0.0028
Am2	0
a/R_s	6.645	0.096
R_p/R_s	0.0982	0.0016
ephemeris [JD]	2459535.8216	0.0012
eccentricity	0.17
inclination [degrees]	87.0
omega [degrees]	0.0
orbital period [days]	3.5438737
u0	2.8852333951847644
u1	-5.200804072207126
u2	5.052448196261344
u3	-1.736877443951638
duration	0.1755	0.0029

Included in ephemeris calculations

Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )

Filter	Detail	Min	Max
I	Cousins I	721.0 nm	875.0 nm

Organization	Observer Code	Secondary Observers
EPW	TESS (collaborate/publish)

Light curve chart for 5b347b16843904b1bf6153d439f3852c

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Parameter	Value	Uncertainty
Am1	1.0002	0.0032
Am2	0
a/R_s	6.95	0.12
R_p/R_s	0.0982	0.0018
ephemeris [JD]	2459507.4705	0.0014
eccentricity	0.17
inclination [degrees]	87.0
omega [degrees]	0.0
orbital period [days]	3.5438737
u0	2.885840783890283
u1	-5.2018022618031425
u2	5.052977005494657
u3	-1.7370154522865726
duration	0.1675	0.0032

Included in ephemeris calculations

Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )

Filter	Detail	Min	Max
I	Cousins I	721.0 nm	875.0 nm

Organization	Observer Code	Secondary Observers
EPW	TESS (collaborate/publish)

Light curve chart for c12c71dbb037d9c802c3e8a7b7adb7d3

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Parameter	Value	Uncertainty
Am1	1.0001	0.003
Am2	0
a/R_s	6.71	0.1
R_p/R_s	0.1	0.0019
ephemeris [JD]	2459578.3479	0.0013
eccentricity	0.17
inclination [degrees]	87.0
omega [degrees]	0.0
orbital period [days]	3.5438737
u0	2.8847997258330715
u1	-5.199146243003352
u2	5.050374861009063
u3	-1.736028268582332
duration	0.1741	0.003

Included in ephemeris calculations

Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )

Filter	Detail	Min	Max
I	Cousins I	721.0 nm	875.0 nm

Organization	Observer Code	Secondary Observers
EPW	TESS (collaborate/publish)

Light curve chart for 0fa55dcbb84439c52ebac00f5340b05e

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Parameter	Value	Uncertainty
Am1	1.0004	0.0029
Am2	0
a/R_s	6.529	0.096
R_p/R_s	0.0977	0.0017
ephemeris [JD]	2459532.2782	0.0013
eccentricity	0.17
inclination [degrees]	87.0
omega [degrees]	0.0
orbital period [days]	3.5438737
u0	2.8847878114893932
u1	-5.2003173547337775
u2	5.0527242549677895
u3	-1.7371946364319468
duration	0.1794	0.003

Included in ephemeris calculations

Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )

Filter	Detail	Min	Max
I	Cousins I	721.0 nm	875.0 nm

Organization	Observer Code	Secondary Observers
EPW	TESS (collaborate/publish)