| 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 |
-0.998 |
| 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) |
| 2026-03-26 00:00 |
16:38:19.74 |
+58:36:39.7 |
HIP 81284 |
22.72 |
| 2026-03-26 12:00 |
16:38:10.76 |
+58:39:08.5 |
HIP 81284 |
20.24 |
| 2026-03-27 00:00 |
16:38:01.62 |
+58:41:36.7 |
HIP 81364 |
17.77 |
| 2026-03-27 12:00 |
16:37:52.32 |
+58:44:04.3 |
HIP 81364 |
15.03 |
| 2026-03-28 00:00 |
16:37:42.85 |
+58:46:31.3 |
HIP 81364 |
12.29 |
| 2026-03-28 12:00 |
16:37:33.23 |
+58:48:57.7 |
HIP 81364 |
9.55 |
| 2026-03-29 00:00 |
16:37:23.44 |
+58:51:23.4 |
HIP 81364 |
6.82 |
| 2026-03-29 12:00 |
16:37:13.50 |
+58:53:48.5 |
HIP 81364 |
4.08 |
| 2026-03-30 00:00 |
16:37:03.39 |
+58:56:13.0 |
HIP 81364 |
1.34 |
| 2026-03-30 12:00 |
16:36:53.13 |
+58:58:36.8 |
HIP 81364 |
1.41 |
| 2026-03-31 00:00 |
16:36:42.70 |
+59:01:00.0 |
HIP 81364 |
4.14 |
| 2026-03-31 12:00 |
16:36:32.12 |
+59:03:22.4 |
HIP 81364 |
6.88 |
| 2026-04-01 00:00 |
16:36:21.38 |
+59:05:44.2 |
HIP 81364 |
9.61 |
| 2026-04-01 12:00 |
16:36:10.48 |
+59:08:05.3 |
HIP 81364 |
12.35 |
| 2026-04-02 00:00 |
16:35:59.43 |
+59:10:25.6 |
HIP 81364 |
15.08 |
| 2026-04-02 12:00 |
16:35:48.22 |
+59:12:45.3 |
HIP 81364 |
17.82 |
| 2026-04-03 00:00 |
16:35:36.85 |
+59:15:04.2 |
HIP 81364 |
20.55 |
| 2026-04-03 12:00 |
16:35:25.33 |
+59:17:22.3 |
HIP 81364 |
23.28 |
| 2026-04-04 00:00 |
16:35:13.65 |
+59:19:39.7 |
HIP 81091 |
23.60 |
| 2026-04-04 12:00 |
16:35:01.82 |
+59:21:56.3 |
HIP 81091 |
20.88 |
| 2026-04-05 00:00 |
16:34:49.83 |
+59:24:12.2 |
HIP 81091 |
18.18 |
| 2026-04-05 12:00 |
16:34:37.69 |
+59:26:27.2 |
HIP 81091 |
15.49 |
| 2026-04-06 00:00 |
16:34:25.40 |
+59:28:41.5 |
HIP 81091 |
12.83 |
| 2026-04-06 12:00 |
16:34:12.96 |
+59:30:54.9 |
HIP 81091 |
10.20 |
| 2026-04-07 00:00 |
16:34:00.36 |
+59:33:07.5 |
HIP 81091 |
7.66 |
| 2026-04-07 12:00 |
16:33:47.62 |
+59:35:19.3 |
HIP 81091 |
5.31 |
| 2026-04-08 00:00 |
16:33:34.72 |
+59:37:30.2 |
HIP 81091 |
3.57 |
| 2026-04-08 12:00 |
16:33:21.67 |
+59:39:40.3 |
HIP 81091 |
3.51 |
| 2026-04-09 00:00 |
16:33:08.48 |
+59:41:49.5 |
HIP 81091 |
5.18 |
| 2026-04-09 12:00 |
16:32:55.13 |
+59:43:57.9 |
HIP 81091 |
7.50 |
| 2026-04-10 00:00 |
16:32:41.64 |
+59:46:05.3 |
HIP 81091 |
10.03 |
| 2026-04-10 12:00 |
16:32:28.01 |
+59:48:11.8 |
HIP 81091 |
12.64 |
| 2026-04-11 00:00 |
16:32:14.22 |
+59:50:17.5 |
HIP 81091 |
15.29 |
| 2026-04-11 12:00 |
16:32:00.30 |
+59:52:22.2 |
HIP 81091 |
17.97 |
| 2026-04-12 00:00 |
16:31:46.22 |
+59:54:26.0 |
HIP 81091 |
20.65 |
| 2026-04-12 12:00 |
16:31:32.01 |
+59:56:28.8 |
HIP 81091 |
23.35 |
| 2026-04-13 00:00 |
16:31:17.65 |
+59:58:30.7 |
HIP 80669 |
26.01 |
| 2026-04-13 12:00 |
16:31:03.16 |
+60:00:31.6 |
HIP 80669 |
25.42 |
| 2026-04-14 00:00 |
16:30:48.52 |
+60:02:31.5 |
HIP 80669 |
25.08 |
| 2026-04-14 12:00 |
16:30:33.74 |
+60:04:30.5 |
HIP 80669 |
25.01 |
| 2026-04-15 00:00 |
16:30:18.83 |
+60:06:28.4 |
HIP 80669 |
25.22 |
| 2026-04-15 12:00 |
16:30:03.78 |
+60:08:25.4 |
HIP 80966 |
24.93 |
| 2026-04-16 00:00 |
16:29:48.59 |
+60:10:21.3 |
HIP 80966 |
24.57 |