|
C/2022 U1 (Leonard) |
| ephemeris |
date |
magn |
radius |
delta |
ra |
dec |
elong |
phase |
PA |
| Nearest approach | 28 Oct 2023 | 16.8 | 4.385 AU | 3.683 AU | 23h54m | +56°10' | 129.7° | 10.0° | 136° |
| Perihelion | 26 Mar 2024 | 17.3 | 4.202 AU | 4.896 AU | 22h49m | +38°07' | 41.6° | 9.1° | 324° |
| Today | 23 May 2026 | 20.4 | 7.485 AU | 6.589 AU | 17h50m | -06°59' | 150.2° | 3.9° | 240° |
C/2022 U1 (Leonard)- 2026-05-23
astro.vanbuitenen.nl
The interactive orbit chart above shows the comet's path through the solar system and its position at the given date.
Green and blue lines are shown perpendicular to the ecliptic plane: Green if the path is above the ecliptic plane, blue if it is below.
(Left-click and drag to rotate the view; Right-click and drag to move the view; Use scroll wheel to zoom in our out.)
Light curve
The light curve chart below shows the estimated development of the comet's magnitude. Blue and black dots are visual and photometric CCD observations from COBS.
This lightcurve is being recalculated every 6 hours based on the available COBS/MPC observations (currently 7.6 + 5 log[∆] + 10.0 log[r]). An additional green curve is displayed when an increase in apparent brightness is expected due to forward scattering of sunlight, which occurs when a dust-rich comet is located between the Earth and the Sun. (See Marcus 2007)
Charts
The all-sky chart below shows the path of the comet over the same period as the light curve. The comet's current position is marked yellow.
The following chart shows the short-term path of the comet in a field of view that is optimized for (~10x50) binoculars and finderscopes.
Orbital elements
The orbital elements of C/2022 U1 (Leonard) are:
e (Eccentricity) : 1.0006920
q (Perihelion distance) : 4.2017080
i (Inclination) : 128.13940
Ω (Longitude of ascending node) : 72.53340
ω (Argument of perihelion) : 78.61680
L (Longitude of perihelion) : 0.58938
B (Latitude of perihelion) : 50.44730
T (Time of perihelion passage) : 2460395.72880
Epoch : 2026 May 23
Reference : MPC194182
Classification(s): : Nearly isotropic; New (a > 10000 AU)
Ephemerides
Date Time RA (2000) DEC (2000) delta radius elong phase PA magn
2026-05-22 00:00 UT 17 51 58.6 -06 57 03 6.593 7.474 148.4 4.1 242 20.4
2026-05-23 00:00 UT 17 51 16.9 -06 58 29 6.591 7.480 149.4 4.0 241 20.4
2026-05-23 19:45 UT 17 50 42.4 -06 59 42 6.589 7.485 150.2 3.9 240 20.4
2026-05-24 00:00 UT 17 50 35.0 -06 59 57 6.589 7.486 150.3 3.8 240 20.4
2026-05-25 00:00 UT 17 49 52.7 -07 01 27 6.588 7.492 151.3 3.7 239 20.4
2026-05-26 00:00 UT 17 49 10.2 -07 02 59 6.586 7.498 152.2 3.6 237 20.4
2026-05-27 00:00 UT 17 48 27.5 -07 04 33 6.586 7.503 153.1 3.5 236 20.4
2026-05-28 00:00 UT 17 47 44.5 -07 06 10 6.585 7.509 154.0 3.4 234 20.4
2026-05-29 00:00 UT 17 47 01.3 -07 07 48 6.585 7.515 154.9 3.3 233 20.4
2026-05-30 00:00 UT 17 46 17.9 -07 09 28 6.585 7.521 155.8 3.2 231 20.4
2026-05-31 00:00 UT 17 45 34.3 -07 11 10 6.585 7.527 156.6 3.1 229 20.4
2026-06-01 00:00 UT 17 44 50.5 -07 12 55 6.586 7.533 157.5 3.0 227 20.4
2026-06-02 00:00 UT 17 44 06.6 -07 14 41 6.587 7.539 158.3 2.9 225 20.4
Terminology:
delta: distance between comet and earth in AU
radius: distance between comet and sun in AU
magn: magnitude (brightness) estimate
ra: right ascension in hours (24h = 360deg)
dec: declination in degrees
elong: elongation in degrees (angle sun-earth-comet)
phase: phase angle in degrees (angle sun-comet-earth)
AU: Astronomical Unit (mean distance between earth and sun: 149597870.7 km
Orbital elements usually provided by the MPC (Minor Planet Center).
Observations contributed by observers worldwide, via COBS (Comet Observation Database) or the MPC (Minor Planet Center)
Calculations by a modified version of AAPlus, a C# implementation of the AA+ project by PJ Naughter from the algorithms presented in the book "Astronomical Algorithms" by Jean Meeus.
NGC2000 dso catalog and star labels from VizieR as provided by the Strasbourg astronomical Data Center.
Tycho2 catalog from the ESO archive.
