P/2023 Y2 (Gibbs)
| Parameter |
Value |
| Designation |
P/2023 Y2 (Gibbs) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2023-08-09T20:11:11.523840Z |
| Orbit solution date (soln_date, UTC) |
2025-01-02T20:12:44Z |
| Obs used |
90 |
| NEO |
- |
| M1 |
11.800 |
| K1 |
17.750 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2023-12-17T11:22:10.185600Z |
| Discovery magnitude (MPC) |
19.40 G |
| Discovery observatory (MPC) |
G96 · Mt. Lemmon Survey |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2023-12-10.0000000 |
| e |
0.39215548 |
| q (au) |
2.275929 |
| a (au) |
3.744261 |
| i (deg) |
6.992785 |
| Ω (om, deg) |
79.230881 |
| ω (w, deg) |
16.802088 |
| M (ma, deg) |
16.618047 |
Magnitude
Scatter + Global Linear
$$
M_a = (11.969 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
11.969 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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 |
17:06:59.29 |
-21:37:33.8 |
HIP 83684 |
11.64 |
| 2026-02-03 12:00 |
17:07:20.94 |
-21:38:10.3 |
HIP 83684 |
16.64 |
| 2026-02-04 00:00 |
17:07:42.46 |
-21:38:46.5 |
HIP 83684 |
21.64 |
| 2026-02-04 12:00 |
17:08:03.85 |
-21:39:22.3 |
HIP 83969 |
26.06 |
| 2026-02-05 00:00 |
17:08:25.12 |
-21:39:57.8 |
HIP 83969 |
21.20 |
| 2026-02-05 12:00 |
17:08:46.27 |
-21:40:32.9 |
HIP 83969 |
16.45 |
| 2026-02-06 00:00 |
17:09:07.29 |
-21:41:07.7 |
HIP 83969 |
11.89 |
| 2026-02-06 12:00 |
17:09:28.18 |
-21:41:42.2 |
HIP 83969 |
7.79 |
| 2026-02-07 00:00 |
17:09:48.94 |
-21:42:16.3 |
HIP 83969 |
5.27 |
| 2026-02-07 12:00 |
17:10:09.57 |
-21:42:50.1 |
HIP 83969 |
6.47 |
| 2026-02-08 00:00 |
17:10:30.07 |
-21:43:23.5 |
HIP 83969 |
10.09 |
| 2026-02-08 12:00 |
17:10:50.44 |
-21:43:56.6 |
HIP 83969 |
14.39 |
| 2026-02-09 00:00 |
17:11:10.67 |
-21:44:29.4 |
HIP 84135 |
12.66 |
| 2026-02-09 12:00 |
17:11:30.77 |
-21:45:01.9 |
HIP 84135 |
8.01 |
| 2026-02-10 00:00 |
17:11:50.73 |
-21:45:34.0 |
HIP 84135 |
3.55 |
| 2026-02-10 12:00 |
17:12:10.56 |
-21:46:05.9 |
HIP 84135 |
2.10 |
| 2026-02-11 00:00 |
17:12:30.24 |
-21:46:37.4 |
HIP 84135 |
6.22 |
| 2026-02-11 12:00 |
17:12:49.79 |
-21:47:08.6 |
HIP 84135 |
10.71 |
| 2026-02-12 00:00 |
17:13:09.20 |
-21:47:39.5 |
HIP 84198 |
13.23 |
| 2026-02-12 12:00 |
17:13:28.46 |
-21:48:10.0 |
HIP 84198 |
16.39 |
| 2026-02-13 00:00 |
17:13:47.59 |
-21:48:40.3 |
HIP 84198 |
20.04 |
| 2026-02-13 12:00 |
17:14:06.57 |
-21:49:10.2 |
HIP 84198 |
23.94 |
| 2026-02-14 00:00 |
17:14:25.40 |
-21:49:39.9 |
HIP 84491 |
27.57 |
| 2026-02-14 12:00 |
17:14:44.09 |
-21:50:09.2 |
HIP 84491 |
23.21 |
| 2026-02-15 00:00 |
17:15:02.63 |
-21:50:38.3 |
HIP 84491 |
18.88 |
| 2026-02-15 12:00 |
17:15:21.02 |
-21:51:07.1 |
HIP 84491 |
14.60 |
| 2026-02-16 00:00 |
17:15:39.26 |
-21:51:35.5 |
HIP 84491 |
10.37 |
| 2026-02-16 12:00 |
17:15:57.35 |
-21:52:03.7 |
HIP 84491 |
6.20 |
| 2026-02-17 00:00 |
17:16:15.29 |
-21:52:31.6 |
HIP 84491 |
2.28 |
| 2026-02-17 12:00 |
17:16:33.07 |
-21:52:59.2 |
HIP 84491 |
2.62 |
| 2026-02-18 00:00 |
17:16:50.71 |
-21:53:26.5 |
HIP 84491 |
6.52 |
| 2026-02-18 12:00 |
17:17:08.18 |
-21:53:53.6 |
HIP 84491 |
10.55 |
| 2026-02-19 00:00 |
17:17:25.50 |
-21:54:20.3 |
HIP 84491 |
14.57 |
| 2026-02-19 12:00 |
17:17:42.66 |
-21:54:46.8 |
HIP 84491 |
18.56 |
| 2026-02-20 00:00 |
17:17:59.66 |
-21:55:13.0 |
HIP 84491 |
22.52 |
| 2026-02-20 12:00 |
17:18:16.51 |
-21:55:39.0 |
HIP 84491 |
26.45 |
| 2026-02-21 00:00 |
17:18:33.19 |
-21:56:04.7 |
HIP 84491 |
30.34 |
| 2026-02-21 12:00 |
17:18:49.71 |
-21:56:30.1 |
HIP 84798 |
29.38 |
| 2026-02-22 00:00 |
17:19:06.07 |
-21:56:55.3 |
HIP 84798 |
27.87 |
| 2026-02-22 12:00 |
17:19:22.26 |
-21:57:20.2 |
HIP 84869 |
25.51 |
| 2026-02-23 00:00 |
17:19:38.29 |
-21:57:44.9 |
HIP 84869 |
22.57 |
| 2026-02-23 12:00 |
17:19:54.16 |
-21:58:09.3 |
HIP 84869 |
19.93 |
| 2026-02-24 00:00 |
17:20:09.86 |
-21:58:33.4 |
HIP 84869 |
17.69 |