136199 Eris (Dwarf planet)
© NASA/Hubble Space Telescope
Finder chart
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From Cambridge , 136199 Eris is visible in the dawn sky, rising at 00:37 (EDT) and reaching an altitude of 34° above the south-eastern horizon before fading from view as dawn breaks at around 03:59.
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|
Name
136199 Eris
|
Object type
Dwarf planet
|
Current position
| Computed for: | 20 July 2025 |
| Right ascension: | 01h49m [1] |
| Declination: | −00°07' [1] |
| Constellation: | Cetus |
| Magnitude: | 18.70 (V) [1] |
| Distance: | 95.53 AU 794.47 lightmin [1] |
| Angular motion (speed): | 30.28 arcmin/yr[1] |
| Angular motion (pos ang): | 144.0° |
Orbital elements [1]
| Semi-major axis: | 68.08 AU |
| Eccentricity: | 0.434969 |
| Inclination: | 43.80° |
| Longitude ascending node: | 36.06° |
| Argument of perihelion: | 150.70° |
| Epoch of elements: | 25 January 2025 |
| Mean Anomaly at epoch: | 210.83° |
| Absolute mag (H): | -1.22 [1] |
| Slope parameter (G): | 0.15 [1] |
Derived quantities
| Perihelion: | 38.47 AU |
| Aphelion: | 97.70 AU |
| Orbital period: | 561.76 years |
Visibility from Cambridge
All times shown in Cambridge local time.
Events
| 18 Oct 2025 | – 136199 Eris at opposition |
| 15 Apr 2026 | – 136199 Eris at solar conjunction |
| 18 Oct 2026 | – 136199 Eris at opposition |
| 15 Apr 2027 | – 136199 Eris at solar conjunction |
| 19 Oct 2027 | – 136199 Eris at opposition |
| 15 Apr 2028 | – 136199 Eris at solar conjunction |
| 18 Oct 2028 | – 136199 Eris at opposition |
| 15 Apr 2029 | – 136199 Eris at solar conjunction |
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