| 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) |
| 2026-03-26 00:00 |
00:24:32.31 |
-43:51:07.1 |
HIP 2026 |
12.58 |
| 2026-03-26 12:00 |
00:24:42.53 |
-43:49:29.6 |
HIP 2026 |
10.84 |
| 2026-03-27 00:00 |
00:24:52.75 |
-43:47:53.0 |
HIP 2026 |
9.43 |
| 2026-03-27 12:00 |
00:25:02.96 |
-43:46:17.2 |
HIP 2026 |
8.48 |
| 2026-03-28 00:00 |
00:25:13.17 |
-43:44:42.3 |
HIP 2026 |
8.17 |
| 2026-03-28 12:00 |
00:25:23.36 |
-43:43:08.2 |
HIP 2026 |
8.55 |
| 2026-03-29 00:00 |
00:25:33.55 |
-43:41:35.0 |
HIP 2072 |
7.02 |
| 2026-03-29 12:00 |
00:25:43.73 |
-43:40:02.6 |
HIP 2072 |
5.19 |
| 2026-03-30 00:00 |
00:25:53.90 |
-43:38:31.1 |
HIP 2072 |
4.00 |
| 2026-03-30 12:00 |
00:26:04.06 |
-43:37:00.5 |
HIP 2072 |
4.06 |
| 2026-03-31 00:00 |
00:26:14.21 |
-43:35:30.7 |
HIP 2072 |
5.30 |
| 2026-03-31 12:00 |
00:26:24.34 |
-43:34:01.7 |
HIP 2072 |
7.12 |
| 2026-04-01 00:00 |
00:26:34.47 |
-43:32:33.7 |
HIP 2072 |
9.17 |
| 2026-04-01 12:00 |
00:26:44.58 |
-43:31:06.5 |
HIP 2072 |
11.33 |
| 2026-04-02 00:00 |
00:26:54.68 |
-43:29:40.2 |
HIP 2072 |
13.53 |
| 2026-04-02 12:00 |
00:27:04.76 |
-43:28:14.7 |
HIP 2072 |
15.76 |
| 2026-04-03 00:00 |
00:27:14.83 |
-43:26:50.1 |
HIP 2072 |
18.00 |
| 2026-04-03 12:00 |
00:27:24.89 |
-43:25:26.4 |
HIP 2072 |
20.24 |
| 2026-04-04 00:00 |
00:27:34.93 |
-43:24:03.6 |
HIP 2072 |
22.48 |
| 2026-04-04 12:00 |
00:27:44.95 |
-43:22:41.6 |
HIP 2072 |
24.71 |
| 2026-04-05 00:00 |
00:27:54.95 |
-43:21:20.5 |
HIP 2072 |
26.94 |
| 2026-04-05 12:00 |
00:28:04.94 |
-43:20:00.3 |
HIP 2072 |
29.17 |
| 2026-04-06 00:00 |
00:28:14.91 |
-43:18:40.9 |
HIP 2436 |
30.41 |
| 2026-04-06 12:00 |
00:28:24.86 |
-43:17:22.5 |
HIP 2436 |
28.58 |
| 2026-04-07 00:00 |
00:28:34.80 |
-43:16:04.9 |
HIP 2436 |
26.82 |
| 2026-04-07 12:00 |
00:28:44.71 |
-43:14:48.2 |
HIP 2436 |
25.13 |
| 2026-04-08 00:00 |
00:28:54.60 |
-43:13:32.4 |
HIP 2436 |
23.52 |
| 2026-04-08 12:00 |
00:29:04.47 |
-43:12:17.5 |
HIP 2436 |
22.02 |
| 2026-04-09 00:00 |
00:29:14.32 |
-43:11:03.4 |
HIP 2436 |
20.64 |
| 2026-04-09 12:00 |
00:29:24.14 |
-43:09:50.3 |
HIP 2436 |
19.40 |
| 2026-04-10 00:00 |
00:29:33.94 |
-43:08:38.0 |
HIP 2436 |
18.33 |
| 2026-04-10 12:00 |
00:29:43.72 |
-43:07:26.7 |
HIP 2436 |
17.46 |
| 2026-04-11 00:00 |
00:29:53.47 |
-43:06:16.2 |
HIP 2436 |
16.81 |
| 2026-04-11 12:00 |
00:30:03.20 |
-43:05:06.7 |
HIP 2436 |
16.40 |
| 2026-04-12 00:00 |
00:30:12.90 |
-43:03:58.0 |
HIP 2436 |
16.24 |
| 2026-04-12 12:00 |
00:30:22.58 |
-43:02:50.2 |
HIP 2436 |
16.35 |
| 2026-04-13 00:00 |
00:30:32.23 |
-43:01:43.4 |
HIP 2436 |
16.71 |
| 2026-04-13 12:00 |
00:30:41.85 |
-43:00:37.4 |
HIP 2436 |
17.30 |
| 2026-04-14 00:00 |
00:30:51.44 |
-42:59:32.4 |
HIP 2436 |
18.09 |
| 2026-04-14 12:00 |
00:31:01.00 |
-42:58:28.2 |
HIP 2436 |
19.06 |
| 2026-04-15 00:00 |
00:31:10.53 |
-42:57:25.0 |
HIP 2436 |
20.18 |
| 2026-04-15 12:00 |
00:31:20.04 |
-42:56:22.7 |
HIP 2436 |
21.41 |
| 2026-04-16 00:00 |
00:31:29.51 |
-42:55:21.2 |
HIP 2436 |
22.74 |