|
A/2019 O4 |
| ephemeris |
date |
magn |
radius |
delta |
ra |
dec |
elong |
phase |
PA |
| Nearest approach | 5 Sep 2019 | 21.1 | 3.876 AU | 3.034 AU | 21h41m | +26°58' | 141.7° | 9.3° | 149° |
| Perihelion | 11 Feb 2020 | 21.7 | 3.638 AU | 4.302 AU | 20h29m | +25°07' | 42.6° | 10.6° | 336° |
| Today | 22 Aug 2026 | 27.3 | 15.437 AU | 16.369 AU | 11h06m | -03°49' | 22.1° | 1.4° | 136° |
A/2019 O4- 2026-08-22
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.
The displayed light curve is calculated under the assumption that the object remains inactive. (H=15.10; G=.15).
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 A/2019 O4 are:
e (Eccentricity) : 0.8905950
q (Perihelion distance) : 3.6380920
i (Inclination) : 114.94770
Ω (Longitude of ascending node) : 354.90370
ω (Argument of perihelion) : 61.81160
L (Longitude of perihelion) : 316.70028
B (Latitude of perihelion) : 53.04983
T (Time of perihelion passage) : 2458890.58820
P (Orbital period in years) : 191.76
Epoch : 2026 May 29
Reference : MPC194162
Classification(s): : Nearly isotropic; Returning (a < 10000 AU); Halley type (P < 200 years)
Ephemerides
Date Time RA (2000) DEC (2000) delta radius elong phase PA magn
2026-08-21 00:00 UT 11 06 14.9 -03 47 31 16.355 15.430 23.2 1.5 134 27.3
2026-08-22 00:00 UT 11 06 25.7 -03 49 04 16.366 15.435 22.3 1.4 135 27.3
2026-08-22 07:39 UT 11 06 29.2 -03 49 34 16.369 15.437 22.1 1.4 136 27.3
2026-08-23 00:00 UT 11 06 36.7 -03 50 39 16.376 15.440 21.5 1.4 136 27.3
2026-08-24 00:00 UT 11 06 47.6 -03 52 14 16.386 15.444 20.7 1.3 137 27.3
2026-08-25 00:00 UT 11 06 58.7 -03 53 50 16.395 15.449 19.9 1.3 138 27.3
2026-08-26 00:00 UT 11 07 09.7 -03 55 27 16.405 15.453 19.1 1.2 140 27.3
2026-08-27 00:00 UT 11 07 20.8 -03 57 05 16.414 15.458 18.3 1.2 141 27.3
2026-08-28 00:00 UT 11 07 32.0 -03 58 43 16.423 15.462 17.5 1.1 143 27.3
2026-08-29 00:00 UT 11 07 43.1 -04 00 22 16.431 15.467 16.7 1.1 144 27.3
2026-08-30 00:00 UT 11 07 54.3 -04 02 02 16.440 15.472 15.9 1.0 146 27.3
2026-08-31 00:00 UT 11 08 05.6 -04 03 43 16.448 15.476 15.2 1.0 148 27.3
2026-09-01 00:00 UT 11 08 16.8 -04 05 24 16.455 15.481 14.5 0.9 150 27.3
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.
