HYDROGEN LINE · 21cm
NOMINALH I rest frequency
1420.406 MHz
professional survey reference — the curve the backyard dish is trying to see
backyard instrument
first light pending
20dBi dish + SAWbird H1 + RTL-SDR V4 on the Pi — awaiting its first sky
▬ LAB survey l=90° b=0° (reference)relative intensity, normalized · x: MHz
SPACE WEATHER
NOMINALplanetary Kp
0.67
quiet magnetosphere — nothing shaking
solar wind
285 km/s · 7.5 p/cm³
slow wind — calm solar conditions
X-ray flux
C5.2
minor flare level — negligible effects at Earth
aurora @ 39°N
0%
no aurora chance at Kansas latitude tonight
Kp (7 days) · min 0.3 · max 3.3
METEORS
NOMINALactive showers
none
between annual showers — only sporadic meteors tonight (~5/hour)
last fireball · 2026-08-15
0.13 kt @ 4.0N 115.4W
substantial fireball — ~130 tons of TNT, likely dropped meteorites
COSMIC RAYS
NOMINALOULU neutron monitor
104.3 counts/s
elevated — quiet sun lets more galactic cosmic rays through
vs 24h mean
+1.16%
galactic cosmic rays hitting the upper atmosphere, counted from Finland — a live gauge of the Sun's shielding
OULU counts/s (24h) · min 102.4 · max 104.3
NEAR-EARTH OBJECTS
NOMINAL523609 · 2026-Aug-27
18.4 LD · 22.7 km/s
passes at 18.4× the Moon's distance — routine traffic; ~441m — city-killer class if it ever hit (it won't)
2026 QY1 · 2026-Aug-28
4.5 LD · 9.5 km/s
passes at 4.5× the Moon's distance — routine traffic; ~26m — building-sized rock
2025 QM9 · 2026-Aug-28
15.2 LD · 11.1 km/s
passes at 15.2× the Moon's distance — routine traffic; ~20m — house-sized, would mostly burn up
2026 PP · 2026-Aug-28
9.8 LD · 6.7 km/s
passes at 9.8× the Moon's distance — routine traffic; ~51m — building-sized rock