SPHEREx Discovery Engine

NASA QR2 LEVEL-2 CITIZEN SCIENCE

All-Sky Multi-Epoch Comparator, 102-Band Slicer & Moving Object Hunter

TARGET: Barnard's Star

RA/DEC: 17h 57m 48.5s | +04° 41' 36"

CADENCE: 6-Mo Baseline (Δt=182.5d)

FLAGS: QUAL_OK (0x00)

Coordinate Query

URL SYNC

Search any sky patch by Right Ascension and Declination:

RA (hms / deg)

Dec (dms / deg)

Benchmark Targets

NASA TEST SUITE

Field of View (FOV)

15' (Standard)

Wide FOV tracks fast solar system comets; narrow FOV resolves close brown dwarf binaries.

Comparison Methods

6 MODES

Flip Period (Video Cadence): 0.50 s

0.15s (Rapid) 0.50s (Std) 1.50s (Slow)

Multi-Mission Overlays

CDS / ESA

Gaia DR3 Proper-Motion Vectors NASA allWISE IR Contour Reference Astrometric Target Reticle

6 Detector Arrays Coadd

6 ARRAYS SUMMED

Det 1 (SWIR) Det 2 (SWIR) Det 3 (SWIR) Det 4 (MWIR) Det 5 (MWIR) Det 6 (MWIR)

Coadds flux across all 6 detector focal arrays, improving point-source S/N by up to 2.4× (√6).

Histogram Stretch

Asinh / ZScale

Black Point (Cut-off): 12%

White Point (Peak): 88%

Invert Grayscale (Astronomical Negative)

S/N Threshold Gate

3.5σ

Flagged Discoveries: 0

Target Motion: 10.37 "/yr

EPOCH 1 (2025-A BASELINE) | FOV: 15' × 15' | FLAG: 0x00 (UNCONTAMINATED)

CURSOR: [X: --, Y: --] FLUX: -- MJy/sr

Candidate Telemetry

HIGH PROPER-MOTION STAR

Target Name / ID Barnard's Star (GJ 699)

Equatorial Coordinates 17h 57m 48.5s | +04° 41' 36"

Proper Motion (μ) 10.37 arcsec / yr

Heliocentric Distance 5.96 Light Years

Time-Baseline Coordinate Shift 5.18 arcsec / 0.5 yr (10.4 px)

Quality & Contamination Flags 0x00: Clean Point Source (No Zodi or Moon Glare)

102-Band SED Extracted Spectrum

M4V Cold Photosphere

Generated on-the-fly across SPHEREx's 102 near-IR channels (0.75 – 5.00 µm). Shows diagnostic absorption signatures (CH4, H2O, CO) or variability amplitude.

NASA Target Verification & History

Fastest proper-motion star in the night sky. Discovered in 1916 by E.E. Barnard using early photographic blink comparison plates. SPHEREx resolves its near-infrared molecular band profile with zero stellar flare contamination.