ATLAS
C/2019 Y4-D (ATLAS)
Where is it now
- Distance from Sun
- 17.225 AU
- True anomaly
- 169.01°
- As of
- 17 September 2026
Two-body Kepler propagation — accurate to ~0.1% for major planets over decades, less so for highly-perturbed bodies. Use JPL Horizons for high precision.
In the sky
- Right ascension
- 07h 37m 37s
- Declination
- +12° 24′ 15″
- Constellation
- Canis Minor
- Distance from Earth
- 17.68 AU
- Elongation from the Sun
- 61.84° — well clear of the Sun
Visible from both hemispheres.
From your location
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Two-body approximation, good to about a degree for the planets — enough to find the constellation and know whether it is up.
Orbital elements
- Semi-major axis
- 22.584 AU
- Eccentricity
- 0.9887
- Inclination
- 44.82°
- Orbital period
- 107.3 years
- Perihelion
- 0.255 AU
- Aphelion
- 44.913 AU
- Longitude of ascending node
- 120.58°
- Argument of periapsis
- 177.8°
- Epoch · J2000
- 2458952.5
- Orbit class · HTC
- Halley-type comet
- Earth MOID · 243.4 LD
- 0.6254 AU
- Tisserand (Jupiter)
- 0.673
Orbit quality
Orbit very uncertain — the object may be effectively lost (uncertainty code 9).
- Observations used
- 75
- Data arc
- 8 days
- First observed
- 9 April 2020
- Last observed
- 17 April 2020
- Residual RMS
- 0.92 ″
- Solution · Davide Farnocchia
- 13 July 2026
Visual & observation
- Absolute magnitude (H)
- 13.5
- Total magnitude M₁ · K₁ 4.5
- 13.5
Discovery & classification
Also known as 2019 Y4-D
Sources
- orbital elements: JPL SBDB