| 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) |
| 2026-05-12 00:00 |
20:02:30.69 |
-33:39:24.9 |
HIP 98470 |
27.29 |
| 2026-05-12 12:00 |
20:02:25.73 |
-33:39:51.3 |
HIP 98470 |
26.22 |
| 2026-05-13 00:00 |
20:02:20.69 |
-33:40:17.8 |
HIP 98470 |
25.14 |
| 2026-05-13 12:00 |
20:02:15.55 |
-33:40:44.4 |
HIP 98470 |
24.05 |
| 2026-05-14 00:00 |
20:02:10.34 |
-33:41:11.1 |
HIP 98470 |
22.94 |
| 2026-05-14 12:00 |
20:02:05.03 |
-33:41:38.0 |
HIP 98470 |
21.82 |
| 2026-05-15 00:00 |
20:01:59.64 |
-33:42:04.9 |
HIP 98470 |
20.69 |
| 2026-05-15 12:00 |
20:01:54.17 |
-33:42:31.9 |
HIP 98470 |
19.56 |
| 2026-05-16 00:00 |
20:01:48.61 |
-33:42:59.0 |
HIP 98470 |
18.41 |
| 2026-05-16 12:00 |
20:01:42.96 |
-33:43:26.2 |
HIP 98470 |
17.27 |
| 2026-05-17 00:00 |
20:01:37.23 |
-33:43:53.5 |
HIP 98470 |
16.12 |
| 2026-05-17 12:00 |
20:01:31.42 |
-33:44:20.8 |
HIP 98470 |
14.98 |
| 2026-05-18 00:00 |
20:01:25.52 |
-33:44:48.2 |
HIP 98470 |
13.85 |
| 2026-05-18 12:00 |
20:01:19.54 |
-33:45:15.7 |
HIP 98470 |
12.73 |
| 2026-05-19 00:00 |
20:01:13.48 |
-33:45:43.3 |
HIP 98470 |
11.64 |
| 2026-05-19 12:00 |
20:01:07.33 |
-33:46:10.9 |
HIP 98470 |
10.60 |
| 2026-05-20 00:00 |
20:01:01.11 |
-33:46:38.6 |
HIP 98470 |
9.62 |
| 2026-05-20 12:00 |
20:00:54.80 |
-33:47:06.4 |
HIP 98470 |
8.73 |
| 2026-05-21 00:00 |
20:00:48.40 |
-33:47:34.1 |
HIP 98470 |
7.98 |
| 2026-05-21 12:00 |
20:00:41.93 |
-33:48:02.0 |
HIP 98470 |
7.41 |
| 2026-05-22 00:00 |
20:00:35.38 |
-33:48:29.9 |
HIP 98470 |
7.08 |
| 2026-05-22 12:00 |
20:00:28.74 |
-33:48:57.8 |
HIP 98470 |
7.03 |
| 2026-05-23 00:00 |
20:00:22.03 |
-33:49:25.7 |
HIP 98470 |
7.27 |
| 2026-05-23 12:00 |
20:00:15.24 |
-33:49:53.7 |
HIP 98470 |
7.80 |
| 2026-05-24 00:00 |
20:00:08.37 |
-33:50:21.7 |
HIP 98470 |
8.56 |
| 2026-05-24 12:00 |
20:00:01.42 |
-33:50:49.8 |
HIP 98470 |
9.50 |
| 2026-05-25 00:00 |
19:59:54.39 |
-33:51:17.8 |
HIP 98470 |
10.59 |
| 2026-05-25 12:00 |
19:59:47.29 |
-33:51:45.9 |
HIP 98470 |
11.78 |
| 2026-05-26 00:00 |
19:59:40.11 |
-33:52:13.9 |
HIP 98470 |
13.06 |
| 2026-05-26 12:00 |
19:59:32.85 |
-33:52:42.0 |
HIP 98470 |
14.41 |
| 2026-05-27 00:00 |
19:59:25.52 |
-33:53:10.1 |
HIP 98470 |
15.81 |
| 2026-05-27 12:00 |
19:59:18.11 |
-33:53:38.2 |
HIP 98470 |
17.26 |
| 2026-05-28 00:00 |
19:59:10.63 |
-33:54:06.3 |
HIP 98470 |
18.74 |
| 2026-05-28 12:00 |
19:59:03.07 |
-33:54:34.3 |
HIP 98470 |
20.26 |
| 2026-05-29 00:00 |
19:58:55.44 |
-33:55:02.4 |
HIP 98470 |
21.80 |
| 2026-05-29 12:00 |
19:58:47.73 |
-33:55:30.4 |
HIP 98470 |
23.38 |
| 2026-05-30 00:00 |
19:58:39.96 |
-33:55:58.5 |
HIP 98470 |
24.98 |
| 2026-05-30 12:00 |
19:58:32.11 |
-33:56:26.5 |
HIP 98470 |
26.60 |
| 2026-05-31 00:00 |
19:58:24.18 |
-33:56:54.4 |
HIP 98189 |
27.91 |
| 2026-05-31 12:00 |
19:58:16.19 |
-33:57:22.4 |
HIP 98189 |
26.66 |
| 2026-06-01 00:00 |
19:58:08.12 |
-33:57:50.3 |
HIP 98189 |
25.45 |
| 2026-06-01 12:00 |
19:57:59.99 |
-33:58:18.1 |
HIP 98189 |
24.31 |
| 2026-06-02 00:00 |
19:57:51.78 |
-33:58:46.0 |
HIP 98189 |
23.23 |