C/2023 Q1 (PANSTARRS)
メタデータ
| 項目 |
値 |
| Designation |
C/2023 Q1 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2024-12-01T03:06:18.527040Z |
| Orbit solution date (soln_date, UTC) |
2025-09-30T13:39:24Z |
| Obs used |
1450 |
| NEO |
- |
| M1 |
11.200 |
| K1 |
9.250 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2023-08-20T13:18:30.182400Z |
| Discovery magnitude (MPC) |
22.04 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2024-12-04.0000000 |
| e |
1.00529337 |
| q (au) |
2.575719 |
| a (au) |
-486.593364 |
| i (deg) |
36.643014 |
| Ω (om, deg) |
7.131719 |
| ω (w, deg) |
84.409436 |
| M (ma, deg) |
0.000264 |
等級
散乱 + 全体線形
$$
M_a = (10.831 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
10.831 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.794 |
| k |
0.800 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 2023-07-25 |
2023-11-14 |
+13.9933 |
-9.563 |
| 2023-11-14 |
2024-07-30 |
+1.1915 |
-1.285 |
| 2024-07-30 |
2024-12-01 |
-28.2334 |
+12.220 |
| 2024-12-01 |
2025-05-15 |
+2.7850 |
-1.351 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
12:46:41.50 |
+00:41:14.1 |
HIP 62417 |
19.30 |
| 2026-02-03 12:00 |
12:46:32.67 |
+00:40:40.6 |
HIP 62417 |
20.38 |
| 2026-02-04 00:00 |
12:46:23.64 |
+00:40:08.1 |
HIP 62417 |
21.69 |
| 2026-02-04 12:00 |
12:46:14.41 |
+00:39:36.6 |
HIP 62265 |
22.11 |
| 2026-02-05 00:00 |
12:46:04.98 |
+00:39:06.0 |
HIP 62265 |
21.59 |
| 2026-02-05 12:00 |
12:45:55.36 |
+00:38:36.3 |
HIP 62265 |
21.32 |
| 2026-02-06 00:00 |
12:45:45.55 |
+00:38:07.5 |
HIP 62168 |
20.89 |
| 2026-02-06 12:00 |
12:45:35.54 |
+00:37:39.7 |
HIP 62168 |
18.36 |
| 2026-02-07 00:00 |
12:45:25.34 |
+00:37:12.7 |
HIP 62168 |
15.80 |
| 2026-02-07 12:00 |
12:45:14.94 |
+00:36:46.7 |
HIP 62168 |
13.20 |
| 2026-02-08 00:00 |
12:45:04.36 |
+00:36:21.6 |
HIP 62168 |
10.59 |
| 2026-02-08 12:00 |
12:44:53.58 |
+00:35:57.3 |
HIP 62168 |
7.98 |
| 2026-02-09 00:00 |
12:44:42.62 |
+00:35:33.9 |
HIP 62168 |
5.46 |
| 2026-02-09 12:00 |
12:44:31.46 |
+00:35:11.4 |
HIP 62168 |
3.35 |
| 2026-02-10 00:00 |
12:44:20.13 |
+00:34:49.8 |
HIP 62168 |
2.94 |
| 2026-02-10 12:00 |
12:44:08.60 |
+00:34:29.0 |
HIP 62168 |
4.78 |
| 2026-02-11 00:00 |
12:43:56.90 |
+00:34:09.1 |
HIP 62168 |
7.39 |
| 2026-02-11 12:00 |
12:43:45.01 |
+00:33:50.0 |
HIP 62168 |
10.23 |
| 2026-02-12 00:00 |
12:43:32.93 |
+00:33:31.8 |
HIP 62168 |
13.18 |
| 2026-02-12 12:00 |
12:43:20.68 |
+00:33:14.4 |
HIP 62168 |
16.21 |
| 2026-02-13 00:00 |
12:43:08.25 |
+00:32:57.8 |
HIP 61977 |
16.62 |
| 2026-02-13 12:00 |
12:42:55.65 |
+00:32:42.0 |
HIP 61977 |
13.48 |
| 2026-02-14 00:00 |
12:42:42.86 |
+00:32:27.0 |
HIP 61977 |
10.32 |
| 2026-02-14 12:00 |
12:42:29.91 |
+00:32:12.8 |
HIP 61977 |
7.16 |
| 2026-02-15 00:00 |
12:42:16.78 |
+00:31:59.4 |
HIP 61977 |
4.12 |
| 2026-02-15 12:00 |
12:42:03.48 |
+00:31:46.8 |
HIP 61977 |
2.07 |
| 2026-02-16 00:00 |
12:41:50.01 |
+00:31:34.9 |
HIP 61977 |
3.75 |
| 2026-02-16 12:00 |
12:41:36.38 |
+00:31:23.8 |
HIP 61977 |
6.88 |
| 2026-02-17 00:00 |
12:41:22.58 |
+00:31:13.4 |
HIP 61977 |
10.23 |
| 2026-02-17 12:00 |
12:41:08.61 |
+00:31:03.8 |
HIP 61977 |
13.67 |
| 2026-02-18 00:00 |
12:40:54.49 |
+00:30:54.8 |
HIP 61977 |
17.18 |
| 2026-02-18 12:00 |
12:40:40.20 |
+00:30:46.6 |
HIP 61977 |
20.74 |
| 2026-02-19 00:00 |
12:40:25.76 |
+00:30:39.1 |
HIP 61977 |
24.34 |
| 2026-02-19 12:00 |
12:40:11.16 |
+00:30:32.3 |
HIP 61977 |
27.98 |
| 2026-02-20 00:00 |
12:39:56.41 |
+00:30:26.1 |
HIP 61672 |
27.29 |
| 2026-02-20 12:00 |
12:39:41.51 |
+00:30:20.7 |
HIP 61672 |
24.47 |
| 2026-02-21 00:00 |
12:39:26.46 |
+00:30:15.8 |
HIP 61672 |
21.91 |
| 2026-02-21 12:00 |
12:39:11.26 |
+00:30:11.6 |
HIP 61672 |
19.73 |
| 2026-02-22 00:00 |
12:38:55.92 |
+00:30:08.1 |
HIP 61672 |
18.09 |
| 2026-02-22 12:00 |
12:38:40.43 |
+00:30:05.1 |
HIP 61672 |
17.17 |
| 2026-02-23 00:00 |
12:38:24.81 |
+00:30:02.8 |
HIP 61672 |
17.11 |
| 2026-02-23 12:00 |
12:38:09.05 |
+00:30:01.0 |
HIP 61672 |
17.94 |
| 2026-02-24 00:00 |
12:37:53.15 |
+00:29:59.9 |
HIP 61672 |
19.58 |