| Parameter |
Value |
| Designation |
C/2022 J1 (Maury-Attard) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2022-02-19T01:09:17.403840Z |
| Orbit solution date (soln_date, UTC) |
2022-11-10T22:12:46Z |
| Obs used |
159 |
| NEO |
- |
| M1 |
11.800 |
| K1 |
20.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-05-05T09:15:21.024000Z |
| Discovery magnitude (MPC) |
17.60 G |
| Discovery observatory (MPC) |
W94 · MAPS, San Pedro de Atacama |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2022-05-25.0000000 |
| e |
0.96638573 |
| q (au) |
1.604208 |
| a (au) |
47.724012 |
| i (deg) |
105.929932 |
| Ω (om, deg) |
280.722913 |
| ω (w, deg) |
305.660142 |
| M (ma, deg) |
0.283859 |
Magnitude
Scatter + Global Linear
$$
M_a = (12.315 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
12.315 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| k |
1.000 |
| δ90 |
10.000 |
| 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
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
15:33:10.16 |
+56:22:45.5 |
HIP 76215 |
8.31 |
| 2026-09-20 12:00 |
15:33:17.04 |
+56:21:10.6 |
HIP 76215 |
7.21 |
| 2026-09-21 00:00 |
15:33:24.02 |
+56:19:36.2 |
HIP 76215 |
6.46 |
| 2026-09-21 12:00 |
15:33:31.10 |
+56:18:02.3 |
HIP 76215 |
6.16 |
| 2026-09-22 00:00 |
15:33:38.26 |
+56:16:29.0 |
HIP 76215 |
6.39 |
| 2026-09-22 12:00 |
15:33:45.53 |
+56:14:56.2 |
HIP 76215 |
7.09 |
| 2026-09-23 00:00 |
15:33:52.88 |
+56:13:24.0 |
HIP 76215 |
8.14 |
| 2026-09-23 12:00 |
15:34:00.32 |
+56:11:52.3 |
HIP 76215 |
9.43 |
| 2026-09-24 00:00 |
15:34:07.86 |
+56:10:21.2 |
HIP 76215 |
10.87 |
| 2026-09-24 12:00 |
15:34:15.48 |
+56:08:50.7 |
HIP 76215 |
12.41 |
| 2026-09-25 00:00 |
15:34:23.20 |
+56:07:20.7 |
HIP 76215 |
14.02 |
| 2026-09-25 12:00 |
15:34:31.00 |
+56:05:51.3 |
HIP 76215 |
15.67 |
| 2026-09-26 00:00 |
15:34:38.89 |
+56:04:22.5 |
HIP 76215 |
17.35 |
| 2026-09-26 12:00 |
15:34:46.87 |
+56:02:54.2 |
HIP 76215 |
19.06 |
| 2026-09-27 00:00 |
15:34:54.93 |
+56:01:26.6 |
HIP 76215 |
20.78 |
| 2026-09-27 12:00 |
15:35:03.08 |
+55:59:59.5 |
HIP 76215 |
22.52 |
| 2026-09-28 00:00 |
15:35:11.32 |
+55:58:33.1 |
HIP 76215 |
24.27 |
| 2026-09-28 12:00 |
15:35:19.64 |
+55:57:07.2 |
HIP 76358 |
25.79 |
| 2026-09-29 00:00 |
15:35:28.04 |
+55:55:42.0 |
HIP 76358 |
24.25 |
| 2026-09-29 12:00 |
15:35:36.53 |
+55:54:17.4 |
HIP 76358 |
22.77 |
| 2026-09-30 00:00 |
15:35:45.10 |
+55:52:53.4 |
HIP 76358 |
21.36 |
| 2026-09-30 12:00 |
15:35:53.75 |
+55:51:30.0 |
HIP 76358 |
20.03 |
| 2026-10-01 00:00 |
15:36:02.48 |
+55:50:07.3 |
HIP 76385 |
18.80 |
| 2026-10-01 12:00 |
15:36:11.29 |
+55:48:45.2 |
HIP 76385 |
17.45 |
| 2026-10-02 00:00 |
15:36:20.19 |
+55:47:23.8 |
HIP 76385 |
16.21 |
| 2026-10-02 12:00 |
15:36:29.16 |
+55:46:03.0 |
HIP 76385 |
15.11 |
| 2026-10-03 00:00 |
15:36:38.21 |
+55:44:42.8 |
HIP 76385 |
14.19 |
| 2026-10-03 12:00 |
15:36:47.34 |
+55:43:23.3 |
HIP 76385 |
13.47 |
| 2026-10-04 00:00 |
15:36:56.55 |
+55:42:04.5 |
HIP 76385 |
12.99 |
| 2026-10-04 12:00 |
15:37:05.84 |
+55:40:46.3 |
HIP 76385 |
12.77 |
| 2026-10-05 00:00 |
15:37:15.20 |
+55:39:28.9 |
HIP 76385 |
12.84 |
| 2026-10-05 12:00 |
15:37:24.63 |
+55:38:12.1 |
HIP 76385 |
13.19 |
| 2026-10-06 00:00 |
15:37:34.15 |
+55:36:56.0 |
HIP 76385 |
13.80 |
| 2026-10-06 12:00 |
15:37:43.73 |
+55:35:40.6 |
HIP 76385 |
14.63 |
| 2026-10-07 00:00 |
15:37:53.39 |
+55:34:25.9 |
HIP 76654 |
14.59 |
| 2026-10-07 12:00 |
15:38:03.12 |
+55:33:11.9 |
HIP 76654 |
14.47 |
| 2026-10-08 00:00 |
15:38:12.93 |
+55:31:58.6 |
HIP 76654 |
14.57 |
| 2026-10-08 12:00 |
15:38:22.80 |
+55:30:46.0 |
HIP 76654 |
14.87 |
| 2026-10-09 00:00 |
15:38:32.75 |
+55:29:34.1 |
HIP 76654 |
15.38 |
| 2026-10-09 12:00 |
15:38:42.76 |
+55:28:23.0 |
HIP 76654 |
16.07 |
| 2026-10-10 00:00 |
15:38:52.84 |
+55:27:12.6 |
HIP 76654 |
16.92 |
| 2026-10-10 12:00 |
15:39:03.00 |
+55:26:03.0 |
HIP 76654 |
17.91 |
| 2026-10-11 00:00 |
15:39:13.22 |
+55:24:54.1 |
HIP 76654 |
19.02 |