| Parameter |
Value |
| Designation |
C/2022 N1 (Attard-Maury) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2022-09-10T01:06:56.952000Z |
| Orbit solution date (soln_date, UTC) |
2025-07-31T12:12:22Z |
| Obs used |
222 |
| NEO |
- |
| M1 |
17.600 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-07-02T07:43:58.080000Z |
| Discovery magnitude (MPC) |
17.20 G |
| Discovery observatory (MPC) |
W94 · MAPS, San Pedro de Atacama |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2022-08-01.0000000 |
| e |
0.96002870 |
| q (au) |
1.481828 |
| a (au) |
37.072286 |
| i (deg) |
164.740998 |
| Ω (om, deg) |
301.858165 |
| ω (w, deg) |
41.069648 |
| M (ma, deg) |
359.825138 |
Magnitude
Scatter + Global Linear
$$
M_a = (16.829 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
16.829 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.908 |
| 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 |
07:49:24.44 |
+20:35:14.3 |
HIP 38082 |
20.74 |
| 2026-03-26 12:00 |
07:49:18.92 |
+20:35:23.4 |
HIP 38082 |
19.85 |
| 2026-03-27 00:00 |
07:49:13.51 |
+20:35:32.2 |
HIP 38082 |
19.02 |
| 2026-03-27 12:00 |
07:49:08.20 |
+20:35:40.8 |
HIP 38082 |
18.26 |
| 2026-03-28 00:00 |
07:49:02.99 |
+20:35:49.1 |
HIP 38082 |
17.56 |
| 2026-03-28 12:00 |
07:48:57.89 |
+20:35:57.1 |
HIP 38082 |
16.94 |
| 2026-03-29 00:00 |
07:48:52.89 |
+20:36:04.8 |
HIP 38082 |
16.39 |
| 2026-03-29 12:00 |
07:48:48.00 |
+20:36:12.3 |
HIP 38082 |
15.91 |
| 2026-03-30 00:00 |
07:48:43.20 |
+20:36:19.5 |
HIP 38082 |
15.52 |
| 2026-03-30 12:00 |
07:48:38.51 |
+20:36:26.5 |
HIP 38082 |
15.20 |
| 2026-03-31 00:00 |
07:48:33.93 |
+20:36:33.2 |
HIP 38082 |
14.96 |
| 2026-03-31 12:00 |
07:48:29.44 |
+20:36:39.6 |
HIP 38082 |
14.79 |
| 2026-04-01 00:00 |
07:48:25.06 |
+20:36:45.8 |
HIP 38082 |
14.70 |
| 2026-04-01 12:00 |
07:48:20.78 |
+20:36:51.7 |
HIP 38082 |
14.68 |
| 2026-04-02 00:00 |
07:48:16.61 |
+20:36:57.4 |
HIP 38082 |
14.73 |
| 2026-04-02 12:00 |
07:48:12.54 |
+20:37:02.8 |
HIP 38082 |
14.83 |
| 2026-04-03 00:00 |
07:48:08.56 |
+20:37:08.0 |
HIP 38082 |
14.99 |
| 2026-04-03 12:00 |
07:48:04.69 |
+20:37:12.8 |
HIP 38082 |
15.19 |
| 2026-04-04 00:00 |
07:48:00.93 |
+20:37:17.5 |
HIP 38082 |
15.44 |
| 2026-04-04 12:00 |
07:47:57.26 |
+20:37:21.9 |
HIP 38082 |
15.72 |
| 2026-04-05 00:00 |
07:47:53.70 |
+20:37:26.0 |
HIP 38082 |
16.03 |
| 2026-04-05 12:00 |
07:47:50.24 |
+20:37:29.9 |
HIP 38082 |
16.37 |
| 2026-04-06 00:00 |
07:47:46.87 |
+20:37:33.5 |
HIP 38082 |
16.73 |
| 2026-04-06 12:00 |
07:47:43.62 |
+20:37:36.9 |
HIP 38082 |
17.10 |
| 2026-04-07 00:00 |
07:47:40.46 |
+20:37:40.0 |
HIP 38082 |
17.48 |
| 2026-04-07 12:00 |
07:47:37.40 |
+20:37:42.9 |
HIP 38082 |
17.87 |
| 2026-04-08 00:00 |
07:47:34.44 |
+20:37:45.5 |
HIP 38082 |
18.26 |
| 2026-04-08 12:00 |
07:47:31.58 |
+20:37:47.9 |
HIP 38082 |
18.65 |
| 2026-04-09 00:00 |
07:47:28.83 |
+20:37:50.0 |
HIP 38082 |
19.05 |
| 2026-04-09 12:00 |
07:47:26.17 |
+20:37:51.9 |
HIP 38082 |
19.44 |
| 2026-04-10 00:00 |
07:47:23.61 |
+20:37:53.6 |
HIP 38082 |
19.82 |
| 2026-04-10 12:00 |
07:47:21.16 |
+20:37:55.0 |
HIP 38082 |
20.19 |
| 2026-04-11 00:00 |
07:47:18.80 |
+20:37:56.1 |
HIP 38082 |
20.56 |
| 2026-04-11 12:00 |
07:47:16.54 |
+20:37:57.0 |
HIP 38082 |
20.92 |
| 2026-04-12 00:00 |
07:47:14.38 |
+20:37:57.7 |
HIP 38082 |
21.26 |
| 2026-04-12 12:00 |
07:47:12.32 |
+20:37:58.1 |
HIP 38082 |
21.60 |
| 2026-04-13 00:00 |
07:47:10.36 |
+20:37:58.2 |
HIP 38082 |
21.91 |
| 2026-04-13 12:00 |
07:47:08.49 |
+20:37:58.2 |
HIP 38082 |
22.22 |
| 2026-04-14 00:00 |
07:47:06.73 |
+20:37:57.9 |
HIP 38082 |
22.51 |
| 2026-04-14 12:00 |
07:47:05.06 |
+20:37:57.3 |
HIP 38082 |
22.78 |
| 2026-04-15 00:00 |
07:47:03.49 |
+20:37:56.5 |
HIP 38082 |
23.04 |
| 2026-04-15 12:00 |
07:47:02.02 |
+20:37:55.5 |
HIP 38082 |
23.29 |
| 2026-04-16 00:00 |
07:47:00.64 |
+20:37:54.2 |
HIP 38082 |
23.51 |