136199 Eris (Dwarf planet)

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.
Name
136199 Eris
|
Object type
Dwarf planet
|
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° |
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] |
Perihelion: | 38.47 AU |
Aphelion: | 97.70 AU |
Orbital period: | 561.76 years |
All times shown in Cambridge local time.
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 |