ATLAS
P/2021 PE20 (ATLAS)
Where is it now
- Distance from Sun
- 5.299 AU
- True anomaly
- 204.35°
- 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
- 10h 54m 44s
- Declination
- +21° 55′ 34″
- Constellation
- Leo
- Distance from Earth
- 6.2 AU
- Elongation from the Sun
- 23.43° — near the Sun — look low at dusk or dawn
Favours the northern hemisphere; low or below the horizon from far south.
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
- 3.746 AU
- Eccentricity
- 0.6708
- Inclination
- 20.02°
- Orbital period
- 7.25 years
- Perihelion
- 1.233 AU
- Aphelion
- 6.259 AU
- Longitude of ascending node
- 99.63°
- Argument of periapsis
- 210.45°
- Epoch · J2000
- 2459463.5
- Orbit class · JFc
- Jupiter-family comet (P < 20 y)
- Earth MOID · 99.3 LD
- 0.2551 AU
- Tisserand (Jupiter)
- 2.572
Orbit quality
Orbit reasonably well determined (uncertainty code 5).
- Observations used
- 112
- Data arc
- 95 days
- First observed
- 9 August 2021
- Last observed
- 12 November 2021
- Residual RMS
- 0.61 ″
- Solution · Otto Matic
- 24 April 2023
Visual & observation
- Absolute magnitude (H)
- 15.4
- Total magnitude M₁ · K₁ 16.3
- 15.4
Discovery & classification
Also known as 2021 PE20
Close approaches 3 on record
| When (UTC) | Body | Distance | Lunar distances | Relative speed |
|---|---|---|---|---|
| 2037-09-04 16:48:00 | Jupiter | 0.159 AU | 61.9 LD | 8.9 km/s |
Next ten from today. 1 lunar distance = 384,400 km. Source: JPL close-approach data.
Sources
- orbital elements: JPL SBDB