Measure, not just photograph

Science Night

Tonight's exoplanet transits, lunar events, and the AAVSO program stars your rig can contribute real data on — computed for this site's sky.

site · 34.2°, -116.9°

4 full · 4 total tonight

Exoplanet transits

A 10–30 mmag dip over a few hours is well inside a guided CMOS rig's reach. Ephemerides here are literature values (minutes-level today) — verify on the ETD before you build a run around one, and catch 30+ min of baseline either side.

Planet	Host V	Depth	Ingress	Mid	Egress	Alt in→out	Coverage
WASP-10 b	12.7	29 mmag	08:03	09:09	10:15	39°→66°	full transit
XO-1 b	11.2	20 mmag	06:29	07:59	09:29	69°→32°	full transit
Qatar-1 b	12.8	22 mmag	09:03	09:51	10:39	59°→56°	full transit
HAT-P-7 b	10.5	7 mmag	06:02	08:02	10:02	60°→67°	full transit

0 tonight

Lunar events

The Moon keeps clear of the bright zodiacal stars tonight.

Geocentric moon, ±0.5° + parallax — treat sub-degree passes as "point the scope and check IOTA", not limb predictions. Also your warning to keep broadband targets elsewhere.

13 observable ≥1h tonight

Variable-star program

The AAVSO classics above 25° tonight. One calibrated estimate a night feeds real light curves — report via WebObs.

χ Cyg Mira3.3–14.2 magP 408d6.2h · peaks 89°

T Cep Mira5.2–11.3 magP 388d6.2h · peaks 56°

CH Cyg Symbiotic5.6–10.1 mag6.2h · peaks 74°

β Lyr Eclipser (EB)3.3–4.4 magP 12.94d6.2h · peaks 89°

η Aql Cepheid3.5–4.4 magP 7.177d6.2h · peaks 57°

RR Lyr RR Lyrae7.1–8.1 magP 0.5669d6.2h · peaks 81°

SS Cyg Dwarf nova (UGSS)8.2–12.4 magP 50d6.1h · peaks 81°outburst cycle ~7 weeks — catch the rise

δ Cep Cepheid3.5–4.4 magP 5.366d6.1h · peaks 65°

R CrB RCB fade5.7–14.8 mag5.2h · peaks 84°unpredictable dust fades — nightly estimates matter

T CrB Recurrent nova2.0–10.8 mag5.2h · peaks 82°eruption watch — report anything above 9.5 immediately

ρ Cas Hypergiant (SRd)4.1–6.2 magP 320d4.6h · peaks 60°pre-outburst dimmings are alert-worthy

R Cas Mira4.7–13.5 magP 430d4.2h · peaks 63°

V CVn Semiregular (SRa)6.5–8.6 magP 192d3.5h · peaks 61°

All three panels are pure site-local math (deck `science.ts`) — the same engine the scheduler uses, pointed at measurement instead of pretty pictures.