C/2023 Q2 (PANSTARRS)
メタデータ
| 項目 |
値 |
| Designation |
C/2023 Q2 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2024-06-24T02:17:12.935040Z |
| Orbit solution date (soln_date, UTC) |
2024-07-07T00:42:12Z |
| Obs used |
136 |
| NEO |
- |
| M1 |
11.400 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2023-08-23T06:04:38.208000Z |
| Discovery magnitude (MPC) |
21.14 w |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, Haleakala |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2023-10-03.0000000 |
| e |
0.99053833 |
| q (au) |
3.209446 |
| a (au) |
339.205025 |
| i (deg) |
104.054511 |
| Ω (om, deg) |
92.682369 |
| ω (w, deg) |
171.725609 |
| M (ma, deg) |
359.958177 |
等級
散乱 + 全体線形
$$
M_a = (13.694 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.694 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
1.000 |
| δ90 |
10.000 |
| パラメータ |
記号 |
範囲 |
説明 |
| 太陽・地球距離が1 AUのときの絶対等級 |
H0 |
-5 to 20 |
彗星の固有の明るさ |
| 測光スロープパラメータ |
n |
2 to 6 |
太陽距離に対する明るさ変化率 |
| 前方散乱非対称係数 |
gf |
0.8 to 1 |
前方散乱の強さ |
| 後方散乱非対称係数 |
gb |
-1 to -0.5 |
後方散乱の強さ |
| 分配係数 |
k |
0.8 to 1 |
前方/後方散乱の寄与比 |
| ダスト/ガス明るさ比 |
δ90 |
1 to 10 |
ダスト散乱とガス放射の相対寄与 |
参考: EPSC-DPS2025-160
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
09:31:51.97 |
-81:35:15.8 |
HIP 46731 |
5.28 |
| 2026-02-03 12:00 |
09:29:07.64 |
-81:34:20.1 |
HIP 46731 |
8.07 |
| 2026-02-04 00:00 |
09:26:23.85 |
-81:33:17.7 |
HIP 46731 |
13.31 |
| 2026-02-04 12:00 |
09:23:40.69 |
-81:32:08.6 |
HIP 46731 |
19.08 |
| 2026-02-05 00:00 |
09:20:58.25 |
-81:30:52.8 |
HIP 45183 |
24.07 |
| 2026-02-05 12:00 |
09:18:16.62 |
-81:29:30.3 |
HIP 45183 |
20.96 |
| 2026-02-06 00:00 |
09:15:35.88 |
-81:28:01.2 |
HIP 45183 |
19.38 |
| 2026-02-06 12:00 |
09:12:56.12 |
-81:26:25.5 |
HIP 44949 |
18.57 |
| 2026-02-07 00:00 |
09:10:17.42 |
-81:24:43.2 |
HIP 44949 |
15.09 |
| 2026-02-07 12:00 |
09:07:39.85 |
-81:22:54.4 |
HIP 44949 |
13.61 |
| 2026-02-08 00:00 |
09:05:03.50 |
-81:20:59.2 |
HIP 44949 |
14.76 |
| 2026-02-08 12:00 |
09:02:28.42 |
-81:18:57.5 |
HIP 44949 |
18.05 |
| 2026-02-09 00:00 |
08:59:54.70 |
-81:16:49.5 |
HIP 44949 |
22.58 |
| 2026-02-09 12:00 |
08:57:22.40 |
-81:14:35.1 |
HIP 43092 |
25.79 |
| 2026-02-10 00:00 |
08:54:51.58 |
-81:12:14.6 |
HIP 43092 |
19.63 |
| 2026-02-10 12:00 |
08:52:22.30 |
-81:09:47.8 |
HIP 43092 |
13.54 |
| 2026-02-11 00:00 |
08:49:54.62 |
-81:07:15.0 |
HIP 43092 |
7.66 |
| 2026-02-11 12:00 |
08:47:28.59 |
-81:04:36.1 |
HIP 43092 |
3.45 |
| 2026-02-12 00:00 |
08:45:04.26 |
-81:01:51.3 |
HIP 43092 |
6.59 |
| 2026-02-12 12:00 |
08:42:41.68 |
-80:59:00.6 |
HIP 43092 |
12.38 |
| 2026-02-13 00:00 |
08:40:20.90 |
-80:56:04.1 |
HIP 42221 |
9.17 |
| 2026-02-13 12:00 |
08:38:01.94 |
-80:53:01.8 |
HIP 42221 |
4.20 |
| 2026-02-14 00:00 |
08:35:44.85 |
-80:49:54.0 |
HIP 42221 |
5.50 |
| 2026-02-14 12:00 |
08:33:29.66 |
-80:46:40.5 |
HIP 42221 |
11.06 |
| 2026-02-15 00:00 |
08:31:16.40 |
-80:43:21.7 |
HIP 42221 |
17.14 |
| 2026-02-15 12:00 |
08:29:05.09 |
-80:39:57.4 |
HIP 40949 |
18.73 |
| 2026-02-16 00:00 |
08:26:55.77 |
-80:36:27.9 |
HIP 40949 |
14.65 |
| 2026-02-16 12:00 |
08:24:48.45 |
-80:32:53.1 |
HIP 40949 |
12.62 |
| 2026-02-17 00:00 |
08:22:43.15 |
-80:29:13.3 |
HIP 40949 |
13.60 |
| 2026-02-17 12:00 |
08:20:39.88 |
-80:25:28.4 |
HIP 40949 |
17.08 |
| 2026-02-18 00:00 |
08:18:38.66 |
-80:21:38.6 |
HIP 40949 |
21.92 |
| 2026-02-18 12:00 |
08:16:39.49 |
-80:17:44.0 |
HIP 40034 |
22.96 |
| 2026-02-19 00:00 |
08:14:42.39 |
-80:13:44.7 |
HIP 40034 |
23.69 |
| 2026-02-19 12:00 |
08:12:47.35 |
-80:09:40.7 |
HIP 40034 |
26.04 |
| 2026-02-20 00:00 |
08:10:54.38 |
-80:05:32.2 |
HIP 40034 |
29.63 |
| 2026-02-20 12:00 |
08:09:03.48 |
-80:01:19.3 |
HIP 39255 |
28.23 |
| 2026-02-21 00:00 |
08:07:14.64 |
-79:57:01.9 |
HIP 39255 |
21.86 |
| 2026-02-21 12:00 |
08:05:27.86 |
-79:52:40.4 |
HIP 39255 |
15.49 |
| 2026-02-22 00:00 |
08:03:43.14 |
-79:48:14.6 |
HIP 39255 |
9.14 |
| 2026-02-22 12:00 |
08:02:00.47 |
-79:43:44.8 |
HIP 39255 |
2.97 |
| 2026-02-23 00:00 |
08:00:19.83 |
-79:39:11.0 |
HIP 39255 |
4.01 |
| 2026-02-23 12:00 |
07:58:41.21 |
-79:34:33.4 |
HIP 38916 |
4.09 |
| 2026-02-24 00:00 |
07:57:04.61 |
-79:29:51.9 |
HIP 38916 |
8.37 |