DEEP SPACE NETWORK
00:00:00 UTC
VOYAGER 1:163.23849 AU
Calculators
Astrophysics Research Crest
ASTROPHYSICS

Center for Deep Space Research

HomeSky MapCalculatorsPapers
Interactive Computation Suite

Scientific Observational Calculators

High-precision numerical estimators for observational astrophysics, cosmological expansion lookback chronologies, and general relativistic black hole spacetime horizons.

Astrophysics Computational Engine

Scientific Observational Calculators

Standard cosmological expansion, exoplanet transmission spectroscopy, and Kerr spacetime solvers.

Planetary & Stellar Parameters

Planet Radius (R_Earth)1.20 R⊕ (7,645 km)
0.5 R⊕ (Mars)1.0 R⊕ (Earth)3.8 R⊕ (Neptune)11.2 R⊕ (Jupiter)
Host Star Radius (R_Sun)1.00 R☉
0.15 R☉ (M-dwarf / TRAPPIST-1)1.0 R☉ (Solar-type G)2.5 R☉ (Subgiant)
Equilibrium Temperature (T_eq)285 K (11.9 °C)
Planet Mass (M_Earth)1.80 M⊕
Target Presets:
Calculated ObservablesJWST / Roman Precision
Transit Depth (δ\delta)
120.5 ppm
120.5 parts-per-million
Scale Height (HH)
6.9 km
g = 12.27 m/s²
5-Scale-Height Atmosphere Feature (Δδ\Delta \delta)
1.1 ppm
⚠ Challenging detection; requires > 10 stacked transits
Theoretical Formulation:
δ=(RpR∗)2,H=kBTeqμg,Δδ≈10RpHR∗2\delta = \left(\frac{R_p}{R_*}\right)^2, \quad H = \frac{k_B T_{\text{eq}}}{\mu g}, \quad \Delta \delta \approx \frac{10 R_p H}{R_*^2}

Space Weather & Transient Observatory

Live heliospheric conditions & automated GCN transient triggers

Planetary K-Index (Kp)
2.33
Quiet (G0)

Low geomagnetic storm probability. Aurora limited to high latitudes.

Solar Radio Flux (10.7 cm)
184 sfu
High Solar Cycle 25

Elevated ultraviolet ionization in the ionospheric F-layer.

Solar Wind Speed
418 km/s
Nominal Stream

Coronal hole high-speed stream passing Earth magnetosphere.

Sunspot Number (SSN)
152 Active
Solar Maximum

9 active magnetic bipolar regions facing Earth.