|
A/2019 O4 |
| ephemeris |
date |
magn |
radius |
delta |
ra |
dec |
elong |
phase |
PA |
| Nearest approach | 5 Sep 2019 | 21.1 | 3.879 AU | 3.037 AU | 21h41m | +26°59' | 141.7° | 9.3° | 149° |
| Perihelion | 11 Feb 2020 | 21.7 | 3.641 AU | 4.306 AU | 20h29m | +25°06' | 42.6° | 10.6° | 336° |
| Today | 5 Feb 2026 | 26.9 | 14.515 AU | 13.728 AU | 11h25m | -04°37' | 141.7° | 2.4° | 303° |
A/2019 O4- 2026-02-05
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) : 0.8903270
q (Perihelion distance) : 3.6412010
i (Inclination) : 114.98290
Ω (Longitude of ascending node) : 354.92390
ω (Argument of perihelion) : 61.80710
L (Longitude of perihelion) : 316.68898
B (Latitude of perihelion) : 53.02484
T (Time of perihelion passage) : 2458890.56580
P (Orbital period in years) : 191.30
Epoch : 2025 Nov 12
Reference : MPEC 2021-P47
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
2026-02-04 00:00 UT 11 25 54.8 -04 38 23 13.737 14.508 140.2 2.5 303 26.9
2026-02-05 00:00 UT 11 25 39.2 -04 37 52 13.730 14.512 141.2 2.4 303 26.9
2026-02-05 10:57 UT 11 25 32.1 -04 37 37 13.728 14.515 141.7 2.4 303 26.9
2026-02-06 00:00 UT 11 25 23.5 -04 37 19 13.724 14.517 142.3 2.4 303 26.9
2026-02-07 00:00 UT 11 25 07.6 -04 36 45 13.719 14.522 143.3 2.3 304 26.9
2026-02-08 00:00 UT 11 24 51.5 -04 36 09 13.713 14.527 144.4 2.3 304 26.9
2026-02-09 00:00 UT 11 24 35.3 -04 35 32 13.708 14.531 145.4 2.2 305 26.8
2026-02-10 00:00 UT 11 24 18.9 -04 34 53 13.703 14.536 146.5 2.1 305 26.8
2026-02-11 00:00 UT 11 24 02.4 -04 34 13 13.698 14.541 147.5 2.1 306 26.8
2026-02-12 00:00 UT 11 23 45.7 -04 33 31 13.694 14.545 148.5 2.0 306 26.8
2026-02-13 00:00 UT 11 23 28.9 -04 32 48 13.690 14.550 149.6 2.0 307 26.8
2026-02-14 00:00 UT 11 23 12.0 -04 32 04 13.686 14.555 150.6 1.9 307 26.8
2026-02-15 00:00 UT 11 22 54.9 -04 31 17 13.682 14.559 151.6 1.8 308 26.8
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.
