C/2022 J1 (Maury-Attard)
| 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) |
| 2026-02-03 00:00 |
16:39:50.45 |
+54:10:03.2 |
HIP 81583 |
13.48 |
| 2026-02-03 12:00 |
16:39:56.67 |
+54:12:28.2 |
HIP 81583 |
11.20 |
| 2026-02-04 00:00 |
16:40:02.78 |
+54:14:53.8 |
HIP 81583 |
9.08 |
| 2026-02-04 12:00 |
16:40:08.78 |
+54:17:19.9 |
HIP 81583 |
7.25 |
| 2026-02-05 00:00 |
16:40:14.65 |
+54:19:46.6 |
HIP 81583 |
5.98 |
| 2026-02-05 12:00 |
16:40:20.40 |
+54:22:13.9 |
HIP 81583 |
5.67 |
| 2026-02-06 00:00 |
16:40:26.04 |
+54:24:41.7 |
HIP 81583 |
6.46 |
| 2026-02-06 12:00 |
16:40:31.55 |
+54:27:10.0 |
HIP 81583 |
8.04 |
| 2026-02-07 00:00 |
16:40:36.94 |
+54:29:38.9 |
HIP 81583 |
10.04 |
| 2026-02-07 12:00 |
16:40:42.20 |
+54:32:08.3 |
HIP 81583 |
12.26 |
| 2026-02-08 00:00 |
16:40:47.35 |
+54:34:38.2 |
HIP 81583 |
14.61 |
| 2026-02-08 12:00 |
16:40:52.36 |
+54:37:08.6 |
HIP 81583 |
17.02 |
| 2026-02-09 00:00 |
16:40:57.26 |
+54:39:39.4 |
HIP 81583 |
19.48 |
| 2026-02-09 12:00 |
16:41:02.02 |
+54:42:10.8 |
HIP 81835 |
20.36 |
| 2026-02-10 00:00 |
16:41:06.66 |
+54:44:42.6 |
HIP 81835 |
18.39 |
| 2026-02-10 12:00 |
16:41:11.17 |
+54:47:14.9 |
HIP 81835 |
16.61 |
| 2026-02-11 00:00 |
16:41:15.55 |
+54:49:47.7 |
HIP 81835 |
15.10 |
| 2026-02-11 12:00 |
16:41:19.80 |
+54:52:20.9 |
HIP 81835 |
13.94 |
| 2026-02-12 00:00 |
16:41:23.92 |
+54:54:54.5 |
HIP 81835 |
13.23 |
| 2026-02-12 12:00 |
16:41:27.91 |
+54:57:28.6 |
HIP 81835 |
13.05 |
| 2026-02-13 00:00 |
16:41:31.76 |
+55:00:03.0 |
HIP 81835 |
13.40 |
| 2026-02-13 12:00 |
16:41:35.48 |
+55:02:37.9 |
HIP 81835 |
14.27 |
| 2026-02-14 00:00 |
16:41:39.07 |
+55:05:13.2 |
HIP 81835 |
15.56 |
| 2026-02-14 12:00 |
16:41:42.53 |
+55:07:48.8 |
HIP 81835 |
17.18 |
| 2026-02-15 00:00 |
16:41:45.84 |
+55:10:24.8 |
HIP 81835 |
19.04 |
| 2026-02-15 12:00 |
16:41:49.02 |
+55:13:01.2 |
HIP 81835 |
21.09 |
| 2026-02-16 00:00 |
16:41:52.07 |
+55:15:37.9 |
HIP 81835 |
23.27 |
| 2026-02-16 12:00 |
16:41:54.97 |
+55:18:15.0 |
HIP 81840 |
24.83 |
| 2026-02-17 00:00 |
16:41:57.74 |
+55:20:52.4 |
HIP 81840 |
22.25 |
| 2026-02-17 12:00 |
16:42:00.36 |
+55:23:30.1 |
HIP 81840 |
19.69 |
| 2026-02-18 00:00 |
16:42:02.85 |
+55:26:08.1 |
HIP 81840 |
17.16 |
| 2026-02-18 12:00 |
16:42:05.20 |
+55:28:46.4 |
HIP 81840 |
14.69 |
| 2026-02-19 00:00 |
16:42:07.40 |
+55:31:25.0 |
HIP 81840 |
12.31 |
| 2026-02-19 12:00 |
16:42:09.46 |
+55:34:03.8 |
HIP 81840 |
10.07 |
| 2026-02-20 00:00 |
16:42:11.38 |
+55:36:43.0 |
HIP 81840 |
8.12 |
| 2026-02-20 12:00 |
16:42:13.15 |
+55:39:22.3 |
HIP 81840 |
6.69 |
| 2026-02-21 00:00 |
16:42:14.78 |
+55:42:01.9 |
HIP 81840 |
6.18 |
| 2026-02-21 12:00 |
16:42:16.26 |
+55:44:41.8 |
HIP 81840 |
6.79 |
| 2026-02-22 00:00 |
16:42:17.60 |
+55:47:21.8 |
HIP 81840 |
8.28 |
| 2026-02-22 12:00 |
16:42:18.79 |
+55:50:02.1 |
HIP 81840 |
10.28 |
| 2026-02-23 00:00 |
16:42:19.84 |
+55:52:42.5 |
HIP 81840 |
12.54 |
| 2026-02-23 12:00 |
16:42:20.74 |
+55:55:23.1 |
HIP 81840 |
14.96 |
| 2026-02-24 00:00 |
16:42:21.49 |
+55:58:03.9 |
HIP 81840 |
17.46 |