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) |
| 2026-05-12 00:00 |
07:19:00.02 |
-64:11:12.0 |
HIP 35211 |
15.99 |
| 2026-05-12 12:00 |
07:19:19.45 |
-64:06:01.8 |
HIP 35211 |
17.78 |
| 2026-05-13 00:00 |
07:19:39.02 |
-64:00:53.2 |
HIP 35694 |
16.22 |
| 2026-05-13 12:00 |
07:19:58.72 |
-63:55:46.2 |
HIP 35694 |
12.65 |
| 2026-05-14 00:00 |
07:20:18.56 |
-63:50:40.6 |
HIP 35694 |
10.87 |
| 2026-05-14 12:00 |
07:20:38.52 |
-63:45:36.6 |
HIP 35502 |
9.61 |
| 2026-05-15 00:00 |
07:20:58.62 |
-63:40:34.2 |
HIP 35502 |
9.20 |
| 2026-05-15 12:00 |
07:21:18.84 |
-63:35:33.3 |
HIP 35502 |
11.75 |
| 2026-05-16 00:00 |
07:21:39.19 |
-63:30:34.1 |
HIP 35502 |
15.87 |
| 2026-05-16 12:00 |
07:21:59.65 |
-63:25:36.4 |
HIP 35502 |
20.64 |
| 2026-05-17 00:00 |
07:22:20.24 |
-63:20:40.3 |
HIP 35408 |
24.94 |
| 2026-05-17 12:00 |
07:22:40.94 |
-63:15:45.8 |
HIP 35979 |
21.15 |
| 2026-05-18 00:00 |
07:23:01.75 |
-63:10:53.0 |
HIP 35979 |
16.13 |
| 2026-05-18 12:00 |
07:23:22.68 |
-63:06:01.7 |
HIP 35979 |
11.47 |
| 2026-05-19 00:00 |
07:23:43.71 |
-63:01:12.2 |
HIP 35979 |
7.81 |
| 2026-05-19 12:00 |
07:24:04.85 |
-62:56:24.2 |
HIP 35979 |
6.91 |
| 2026-05-20 00:00 |
07:24:26.09 |
-62:51:37.9 |
HIP 35979 |
9.56 |
| 2026-05-20 12:00 |
07:24:47.44 |
-62:46:53.3 |
HIP 35979 |
13.83 |
| 2026-05-21 00:00 |
07:25:08.89 |
-62:42:10.4 |
HIP 35979 |
18.63 |
| 2026-05-21 12:00 |
07:25:30.43 |
-62:37:29.1 |
HIP 35979 |
23.63 |
| 2026-05-22 00:00 |
07:25:52.07 |
-62:32:49.5 |
HIP 35854 |
23.33 |
| 2026-05-22 12:00 |
07:26:13.80 |
-62:28:11.6 |
HIP 35854 |
22.36 |
| 2026-05-23 00:00 |
07:26:35.62 |
-62:23:35.3 |
HIP 35854 |
22.65 |
| 2026-05-23 12:00 |
07:26:57.53 |
-62:19:00.8 |
HIP 36241 |
19.94 |
| 2026-05-24 00:00 |
07:27:19.53 |
-62:14:28.0 |
HIP 36241 |
14.88 |
| 2026-05-24 12:00 |
07:27:41.61 |
-62:09:56.9 |
HIP 36241 |
10.02 |
| 2026-05-25 00:00 |
07:28:03.77 |
-62:05:27.5 |
HIP 36241 |
5.82 |
| 2026-05-25 12:00 |
07:28:26.01 |
-62:00:59.8 |
HIP 36241 |
4.63 |
| 2026-05-26 00:00 |
07:28:48.34 |
-61:56:33.8 |
HIP 36241 |
7.90 |
| 2026-05-26 12:00 |
07:29:10.74 |
-61:52:09.6 |
HIP 36241 |
12.51 |
| 2026-05-27 00:00 |
07:29:33.21 |
-61:47:47.1 |
HIP 36341 |
12.69 |
| 2026-05-27 12:00 |
07:29:55.76 |
-61:43:26.3 |
HIP 36341 |
10.79 |
| 2026-05-28 00:00 |
07:30:18.38 |
-61:39:07.3 |
HIP 36341 |
11.15 |
| 2026-05-28 12:00 |
07:30:41.07 |
-61:34:50.0 |
HIP 36494 |
10.14 |
| 2026-05-29 00:00 |
07:31:03.83 |
-61:30:34.5 |
HIP 36494 |
7.05 |
| 2026-05-29 12:00 |
07:31:26.66 |
-61:26:20.7 |
HIP 36494 |
6.93 |
| 2026-05-30 00:00 |
07:31:49.55 |
-61:22:08.7 |
HIP 36494 |
9.86 |
| 2026-05-30 12:00 |
07:32:12.51 |
-61:17:58.4 |
HIP 36494 |
14.02 |
| 2026-05-31 00:00 |
07:32:35.53 |
-61:13:49.9 |
HIP 36861 |
17.68 |
| 2026-05-31 12:00 |
07:32:58.61 |
-61:09:43.1 |
HIP 36861 |
13.40 |
| 2026-06-01 00:00 |
07:33:21.75 |
-61:05:38.2 |
HIP 36861 |
9.77 |
| 2026-06-01 12:00 |
07:33:44.94 |
-61:01:35.0 |
HIP 36861 |
7.73 |
| 2026-06-02 00:00 |
07:34:08.20 |
-60:57:33.5 |
HIP 36861 |
8.49 |