C/2019 Q1 (Lemmon) |
ephemeris |
date |
magn |
radius |
delta |
ra |
dec |
elong |
phase |
PA |
Perihelion | 22 Jul 2020 | 18.7 | 5.003 AU | 4.450 AU | 23h20m | +20°26' | 117.6° | 10.4° | 232° |
Nearest approach | 3 Sep 2020 | 18.6 | 5.013 AU | 4.090 AU | 22h19m | +17°53' | 153.5° | 5.1° | 163° |
Today | 19 Jul 2025 | 25.2 | 13.227 AU | 12.688 AU | 15h45m | -11°19' | 120.1° | 3.8° | 108° |
C/2019 Q1 (Lemmon)- 2025-07-19
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.)
The orbital elements of C/2019 Q1 (Lemmon) are:
e (Eccentricity) : 1.0024100
q (Perihelion distance) : 5.0026190
i (Inclination) : 155.72080
Ω (Longitude of ascending node) : 42.46750
ω (Argument of perihelion) : 56.25460
L (Longitude of perihelion) : -11.29540
B (Latitude of perihelion) : 19.99297
T (Time of perihelion passage) : 2459052.71420
Epoch : 2025 Jul 17
Reference : MPEC 2024-EF7
Classification(s): : Nearly isotropic; New (a > 10000 AU)
The light curve chart below shows the estimated development of the comet's magnitude. Blue and black dots are visual and photometric CCD observations respectively from COBS or the MPC.
The light curve is based on the absolute magnitude and slope parameter as calculated from an MPEC, or the latest values provided by the minor planet center. (8.50 + 5 log[∆] + 10.00 log[r]).
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.
A more printer-friendly version of the same chart can be found further down this page as well.
The following chart shows the current location of the comet in a smaller, upside-down telescopic field of view.
A printable version of the short-term path of the comet in a field of view that is optimized for (~10x50) binoculars and finderscopes.
Ephemerides:
Date Time RA (2000) DEC (2000) delta radius elong phase PA magn
2025-07-19 00:00 UT 15 45 36.8 -11 19 17 12.687 13.227 120.1 3.8 108 25.2
2025-07-19 01:27 UT 15 45 36.0 -11 19 18 12.688 13.227 120.1 3.8 108 25.2
2025-07-20 00:00 UT 15 45 23.2 -11 19 35 12.707 13.232 119.2 3.8 108 25.2
2025-07-21 00:00 UT 15 45 09.8 -11 19 53 12.727 13.237 118.2 3.9 107 25.2
2025-07-22 00:00 UT 15 44 56.7 -11 20 13 12.747 13.243 117.2 3.9 107 25.2
2025-07-23 00:00 UT 15 44 44.0 -11 20 34 12.768 13.248 116.2 3.9 107 25.3
2025-07-24 00:00 UT 15 44 31.6 -11 20 55 12.788 13.253 115.2 4.0 107 25.3
2025-07-25 00:00 UT 15 44 19.5 -11 21 18 12.809 13.258 114.2 4.0 107 25.3
2025-07-26 00:00 UT 15 44 07.6 -11 21 43 12.830 13.264 113.2 4.0 107 25.3
2025-07-27 00:00 UT 15 43 56.2 -11 22 08 12.851 13.269 112.2 4.1 106 25.3
2025-07-28 00:00 UT 15 43 45.0 -11 22 34 12.872 13.274 111.2 4.1 106 25.3
2025-07-29 00:00 UT 15 43 34.1 -11 23 02 12.893 13.280 110.3 4.1 106 25.3
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.