| Parameter |
Value |
| Designation |
C/2019 E3 (ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2023-11-14T09:13:12.357120Z |
| Orbit solution date (soln_date, UTC) |
2026-03-09T08:40:48Z |
| Obs used |
966 |
| NEO |
- |
| M1 |
6.100 |
| K1 |
6.500 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2019-03-05T10:14:33.792000Z |
| Discovery magnitude (MPC) |
18.45 o |
| Discovery observatory (MPC) |
T08 · ATLAS-MLO, Mauna Loa |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2022-08-13.0000000 |
| e |
1.00098564 |
| q (au) |
10.313389 |
| a (au) |
-10463.649101 |
| i (deg) |
84.297542 |
| Ω (om, deg) |
347.253873 |
| ω (w, deg) |
280.665247 |
| M (ma, deg) |
-0.000422 |
Magnitude
Scatter + Global Linear
$$
M_a = (-0.255 + 4.723\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
-0.255 |
| n |
4.723 |
| gf |
0.951 |
| gb |
-0.972 |
| k |
1.000 |
| δ90 |
9.988 |
| Parameter |
Symbol |
Range |
Description |
| Absolute magnitude at 1 AU from Sun and Earth |
H0 |
-5 to 20 |
Intrinsic brightness of the comet |
| Photometric slope parameter |
n |
2 to 6 |
Rate of brightness change with heliocentric distance |
| Forward scattering asymmetry factor |
gf |
0.8 to 1 |
Degree of forward scattering |
| Backward scattering asymmetry factor |
gb |
-1 to -0.5 |
Degree of backward scattering |
| Partitioning coefficient |
k |
0.8 to 1 |
Ratio between forward/backward scattering contributions |
| Dust-to-gas brightness ratio |
δ90 |
1 to 10 |
Relative contribution of dust scattering to gas emission |
Reference: EPSC-DPS2025-160
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
00:38:42.56 |
-42:23:05.4 |
HIP 3081 |
16.71 |
| 2026-05-12 12:00 |
00:38:49.46 |
-42:22:52.2 |
HIP 3081 |
16.62 |
| 2026-05-13 00:00 |
00:38:56.29 |
-42:22:39.9 |
HIP 3081 |
16.60 |
| 2026-05-13 12:00 |
00:39:03.06 |
-42:22:28.4 |
HIP 3081 |
16.67 |
| 2026-05-14 00:00 |
00:39:09.77 |
-42:22:17.9 |
HIP 3081 |
16.82 |
| 2026-05-14 12:00 |
00:39:16.41 |
-42:22:08.3 |
HIP 3081 |
17.05 |
| 2026-05-15 00:00 |
00:39:22.97 |
-42:21:59.6 |
HIP 3081 |
17.34 |
| 2026-05-15 12:00 |
00:39:29.48 |
-42:21:51.7 |
HIP 3081 |
17.70 |
| 2026-05-16 00:00 |
00:39:35.91 |
-42:21:44.8 |
HIP 3081 |
18.11 |
| 2026-05-16 12:00 |
00:39:42.27 |
-42:21:38.7 |
HIP 3081 |
18.57 |
| 2026-05-17 00:00 |
00:39:48.56 |
-42:21:33.5 |
HIP 3081 |
19.07 |
| 2026-05-17 12:00 |
00:39:54.78 |
-42:21:29.2 |
HIP 3081 |
19.61 |
| 2026-05-18 00:00 |
00:40:00.93 |
-42:21:25.8 |
HIP 3081 |
20.18 |
| 2026-05-18 12:00 |
00:40:07.01 |
-42:21:23.3 |
HIP 3081 |
20.78 |
| 2026-05-19 00:00 |
00:40:13.02 |
-42:21:21.6 |
HIP 3081 |
21.40 |
| 2026-05-19 12:00 |
00:40:18.95 |
-42:21:20.8 |
HIP 3081 |
22.04 |
| 2026-05-20 00:00 |
00:40:24.80 |
-42:21:20.9 |
HIP 3081 |
22.69 |
| 2026-05-20 12:00 |
00:40:30.59 |
-42:21:21.9 |
HIP 3081 |
23.36 |
| 2026-05-21 00:00 |
00:40:36.30 |
-42:21:23.7 |
HIP 3271 |
23.66 |
| 2026-05-21 12:00 |
00:40:41.93 |
-42:21:26.4 |
HIP 3271 |
23.20 |
| 2026-05-22 00:00 |
00:40:47.48 |
-42:21:29.9 |
HIP 3271 |
22.78 |
| 2026-05-22 12:00 |
00:40:52.96 |
-42:21:34.3 |
HIP 3271 |
22.43 |
| 2026-05-23 00:00 |
00:40:58.36 |
-42:21:39.5 |
HIP 3271 |
22.14 |
| 2026-05-23 12:00 |
00:41:03.69 |
-42:21:45.6 |
HIP 3271 |
21.90 |
| 2026-05-24 00:00 |
00:41:08.93 |
-42:21:52.6 |
HIP 3271 |
21.73 |
| 2026-05-24 12:00 |
00:41:14.10 |
-42:22:00.3 |
HIP 3271 |
21.62 |
| 2026-05-25 00:00 |
00:41:19.19 |
-42:22:09.0 |
HIP 3271 |
21.56 |
| 2026-05-25 12:00 |
00:41:24.19 |
-42:22:18.4 |
HIP 3271 |
21.57 |
| 2026-05-26 00:00 |
00:41:29.12 |
-42:22:28.7 |
HIP 3271 |
21.63 |
| 2026-05-26 12:00 |
00:41:33.96 |
-42:22:39.8 |
HIP 3271 |
21.74 |
| 2026-05-27 00:00 |
00:41:38.73 |
-42:22:51.8 |
HIP 3271 |
21.91 |
| 2026-05-27 12:00 |
00:41:43.41 |
-42:23:04.5 |
HIP 3271 |
22.12 |
| 2026-05-28 00:00 |
00:41:48.01 |
-42:23:18.1 |
HIP 3271 |
22.38 |
| 2026-05-28 12:00 |
00:41:52.53 |
-42:23:32.5 |
HIP 3271 |
22.69 |
| 2026-05-29 00:00 |
00:41:56.96 |
-42:23:47.7 |
HIP 3271 |
23.03 |
| 2026-05-29 12:00 |
00:42:01.31 |
-42:24:03.8 |
HIP 3271 |
23.42 |
| 2026-05-30 00:00 |
00:42:05.58 |
-42:24:20.6 |
HIP 3271 |
23.83 |
| 2026-05-30 12:00 |
00:42:09.76 |
-42:24:38.2 |
HIP 3271 |
24.28 |
| 2026-05-31 00:00 |
00:42:13.85 |
-42:24:56.7 |
HIP 3271 |
24.76 |
| 2026-05-31 12:00 |
00:42:17.86 |
-42:25:15.9 |
HIP 3271 |
25.26 |
| 2026-06-01 00:00 |
00:42:21.78 |
-42:25:35.9 |
HIP 3271 |
25.79 |
| 2026-06-01 12:00 |
00:42:25.62 |
-42:25:56.7 |
HIP 3492 |
26.09 |
| 2026-06-02 00:00 |
00:42:29.36 |
-42:26:18.3 |
HIP 3492 |
25.31 |