C/2022 A1 (Sarneczky)
| Parameter |
Value |
| Designation |
C/2022 A1 (Sarneczky) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2022-01-31T03:23:29.235840Z |
| Orbit solution date (soln_date, UTC) |
2025-01-14T17:42:12Z |
| Obs used |
316 |
| NEO |
- |
| M1 |
18.400 |
| K1 |
17.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-01-02T02:37:18.336000Z |
| Discovery magnitude (MPC) |
18.20 R |
| Discovery observatory (MPC) |
K88 · GINOP-KHK, Piszkéstető |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2022-01-07.0000000 |
| e |
0.99916780 |
| q (au) |
1.252910 |
| a (au) |
1505.543465 |
| i (deg) |
116.526637 |
| Ω (om, deg) |
285.521193 |
| ω (w, deg) |
201.184705 |
| M (ma, deg) |
359.999593 |
Magnitude
Scatter + Global Linear
$$
M_a = (18.046 + 5.791\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
18.046 |
| n |
5.791 |
| gf |
1.000 |
| gb |
-0.582 |
| k |
0.986 |
| 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 |
19:52:47.48 |
-33:31:21.2 |
HIP 97977 |
27.99 |
| 2026-02-03 12:00 |
19:52:56.30 |
-33:30:55.9 |
HIP 97977 |
26.19 |
| 2026-02-04 00:00 |
19:53:05.09 |
-33:30:30.8 |
HIP 97977 |
24.42 |
| 2026-02-04 12:00 |
19:53:13.85 |
-33:30:06.0 |
HIP 97977 |
22.67 |
| 2026-02-05 00:00 |
19:53:22.58 |
-33:29:41.4 |
HIP 97977 |
20.95 |
| 2026-02-05 12:00 |
19:53:31.28 |
-33:29:17.1 |
HIP 97977 |
19.26 |
| 2026-02-06 00:00 |
19:53:39.95 |
-33:28:53.1 |
HIP 97977 |
17.62 |
| 2026-02-06 12:00 |
19:53:48.58 |
-33:28:29.3 |
HIP 97977 |
16.03 |
| 2026-02-07 00:00 |
19:53:57.19 |
-33:28:05.8 |
HIP 97977 |
14.51 |
| 2026-02-07 12:00 |
19:54:05.76 |
-33:27:42.6 |
HIP 97977 |
13.08 |
| 2026-02-08 00:00 |
19:54:14.30 |
-33:27:19.6 |
HIP 97977 |
11.77 |
| 2026-02-08 12:00 |
19:54:22.81 |
-33:26:56.9 |
HIP 97977 |
10.62 |
| 2026-02-09 00:00 |
19:54:31.28 |
-33:26:34.5 |
HIP 97977 |
9.68 |
| 2026-02-09 12:00 |
19:54:39.71 |
-33:26:12.3 |
HIP 97977 |
9.01 |
| 2026-02-10 00:00 |
19:54:48.11 |
-33:25:50.4 |
HIP 97977 |
8.68 |
| 2026-02-10 12:00 |
19:54:56.47 |
-33:25:28.8 |
HIP 97977 |
8.71 |
| 2026-02-11 00:00 |
19:55:04.80 |
-33:25:07.5 |
HIP 97977 |
9.09 |
| 2026-02-11 12:00 |
19:55:13.09 |
-33:24:46.4 |
HIP 97977 |
9.79 |
| 2026-02-12 00:00 |
19:55:21.34 |
-33:24:25.6 |
HIP 97977 |
10.73 |
| 2026-02-12 12:00 |
19:55:29.55 |
-33:24:05.1 |
HIP 97977 |
11.86 |
| 2026-02-13 00:00 |
19:55:37.73 |
-33:23:44.8 |
HIP 97977 |
13.12 |
| 2026-02-13 12:00 |
19:55:45.86 |
-33:23:24.9 |
HIP 98129 |
13.19 |
| 2026-02-14 00:00 |
19:55:53.95 |
-33:23:05.2 |
HIP 98129 |
12.10 |
| 2026-02-14 12:00 |
19:56:02.00 |
-33:22:45.8 |
HIP 98129 |
11.17 |
| 2026-02-15 00:00 |
19:56:10.01 |
-33:22:26.7 |
HIP 98129 |
10.44 |
| 2026-02-15 12:00 |
19:56:17.98 |
-33:22:07.8 |
HIP 98129 |
9.95 |
| 2026-02-16 00:00 |
19:56:25.91 |
-33:21:49.3 |
HIP 98129 |
9.73 |
| 2026-02-16 12:00 |
19:56:33.79 |
-33:21:31.0 |
HIP 98129 |
9.79 |
| 2026-02-17 00:00 |
19:56:41.63 |
-33:21:13.0 |
HIP 98129 |
10.13 |
| 2026-02-17 12:00 |
19:56:49.42 |
-33:20:55.3 |
HIP 98129 |
10.71 |
| 2026-02-18 00:00 |
19:56:57.17 |
-33:20:37.9 |
HIP 98129 |
11.50 |
| 2026-02-18 12:00 |
19:57:04.87 |
-33:20:20.8 |
HIP 98129 |
12.44 |
| 2026-02-19 00:00 |
19:57:12.52 |
-33:20:03.9 |
HIP 98129 |
13.50 |
| 2026-02-19 12:00 |
19:57:20.13 |
-33:19:47.4 |
HIP 98129 |
14.66 |
| 2026-02-20 00:00 |
19:57:27.69 |
-33:19:31.2 |
HIP 98129 |
15.89 |
| 2026-02-20 12:00 |
19:57:35.21 |
-33:19:15.2 |
HIP 98331 |
14.39 |
| 2026-02-21 00:00 |
19:57:42.67 |
-33:18:59.5 |
HIP 98331 |
12.83 |
| 2026-02-21 12:00 |
19:57:50.09 |
-33:18:44.2 |
HIP 98331 |
11.28 |
| 2026-02-22 00:00 |
19:57:57.46 |
-33:18:29.1 |
HIP 98331 |
9.76 |
| 2026-02-22 12:00 |
19:58:04.77 |
-33:18:14.3 |
HIP 98331 |
8.27 |
| 2026-02-23 00:00 |
19:58:12.04 |
-33:17:59.8 |
HIP 98331 |
6.81 |
| 2026-02-23 12:00 |
19:58:19.25 |
-33:17:45.6 |
HIP 98331 |
5.40 |
| 2026-02-24 00:00 |
19:58:26.41 |
-33:17:31.7 |
HIP 98331 |
4.09 |