C/2023 R2 (PANSTARRS)
メタデータ
| 項目 |
値 |
| Designation |
C/2023 R2 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2024-08-12T01:57:59.866560Z |
| Orbit solution date (soln_date, UTC) |
2024-06-06T23:12:31Z |
| Obs used |
309 |
| NEO |
- |
| M1 |
12.900 |
| K1 |
6.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2023-09-10T14:09:06.796800Z |
| Discovery magnitude (MPC) |
20.68 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) |
2023-10-29.0000000 |
| e |
1.00072698 |
| q (au) |
0.905829 |
| a (au) |
-1246.024129 |
| i (deg) |
30.735653 |
| Ω (om, deg) |
188.987598 |
| ω (w, deg) |
337.188855 |
| M (ma, deg) |
-0.006456 |
等級
散乱 + 全体線形
$$
M_a = (13.443 + 3.943\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.443 |
| n |
3.943 |
| gf |
1.000 |
| gb |
-0.721 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
20:13:16.05 |
+05:05:04.5 |
HIP 99650 |
13.59 |
| 2026-02-03 12:00 |
20:13:34.61 |
+05:06:20.7 |
HIP 99650 |
12.58 |
| 2026-02-04 00:00 |
20:13:53.13 |
+05:07:37.5 |
HIP 99650 |
13.32 |
| 2026-02-04 12:00 |
20:14:11.60 |
+05:08:55.0 |
HIP 99650 |
15.55 |
| 2026-02-05 00:00 |
20:14:30.03 |
+05:10:13.1 |
HIP 99650 |
18.74 |
| 2026-02-05 12:00 |
20:14:48.40 |
+05:11:31.9 |
HIP 99650 |
22.48 |
| 2026-02-06 00:00 |
20:15:06.72 |
+05:12:51.4 |
HIP 99650 |
26.53 |
| 2026-02-06 12:00 |
20:15:25.00 |
+05:14:11.5 |
HIP 99650 |
30.77 |
| 2026-02-07 00:00 |
20:15:43.22 |
+05:15:32.2 |
HIP 99650 |
35.13 |
| 2026-02-07 12:00 |
20:16:01.39 |
+05:16:53.6 |
HIP 100050 |
33.51 |
| 2026-02-08 00:00 |
20:16:19.51 |
+05:18:15.6 |
HIP 100050 |
29.01 |
| 2026-02-08 12:00 |
20:16:37.57 |
+05:19:38.3 |
HIP 100050 |
24.60 |
| 2026-02-09 00:00 |
20:16:55.58 |
+05:21:01.6 |
HIP 100050 |
20.33 |
| 2026-02-09 12:00 |
20:17:13.54 |
+05:22:25.5 |
HIP 100050 |
16.29 |
| 2026-02-10 00:00 |
20:17:31.44 |
+05:23:50.0 |
HIP 100050 |
12.69 |
| 2026-02-10 12:00 |
20:17:49.29 |
+05:25:15.1 |
HIP 100050 |
10.01 |
| 2026-02-11 00:00 |
20:18:07.08 |
+05:26:40.9 |
HIP 100050 |
9.09 |
| 2026-02-11 12:00 |
20:18:24.81 |
+05:28:07.2 |
HIP 100050 |
10.39 |
| 2026-02-12 00:00 |
20:18:42.49 |
+05:29:34.1 |
HIP 100050 |
13.26 |
| 2026-02-12 12:00 |
20:19:00.10 |
+05:31:01.7 |
HIP 100050 |
16.92 |
| 2026-02-13 00:00 |
20:19:17.66 |
+05:32:29.8 |
HIP 100264 |
16.89 |
| 2026-02-13 12:00 |
20:19:35.16 |
+05:33:58.5 |
HIP 100264 |
14.73 |
| 2026-02-14 00:00 |
20:19:52.60 |
+05:35:27.8 |
HIP 100264 |
13.84 |
| 2026-02-14 12:00 |
20:20:09.98 |
+05:36:57.7 |
HIP 100264 |
14.44 |
| 2026-02-15 00:00 |
20:20:27.29 |
+05:38:28.1 |
HIP 100264 |
16.35 |
| 2026-02-15 12:00 |
20:20:44.55 |
+05:39:59.1 |
HIP 100264 |
19.19 |
| 2026-02-16 00:00 |
20:21:01.74 |
+05:41:30.7 |
HIP 100279 |
22.42 |
| 2026-02-16 12:00 |
20:21:18.86 |
+05:43:02.8 |
HIP 100279 |
23.22 |
| 2026-02-17 00:00 |
20:21:35.92 |
+05:44:35.5 |
HIP 100279 |
24.82 |
| 2026-02-17 12:00 |
20:21:52.92 |
+05:46:08.7 |
HIP 100552 |
24.62 |
| 2026-02-18 00:00 |
20:22:09.85 |
+05:47:42.5 |
HIP 100552 |
21.96 |
| 2026-02-18 12:00 |
20:22:26.72 |
+05:49:16.8 |
HIP 100552 |
19.98 |
| 2026-02-19 00:00 |
20:22:43.51 |
+05:50:51.6 |
HIP 100552 |
18.89 |
| 2026-02-19 12:00 |
20:23:00.24 |
+05:52:26.9 |
HIP 100512 |
18.58 |
| 2026-02-20 00:00 |
20:23:16.90 |
+05:54:02.8 |
HIP 100512 |
17.85 |
| 2026-02-20 12:00 |
20:23:33.50 |
+05:55:39.2 |
HIP 100512 |
18.20 |
| 2026-02-21 00:00 |
20:23:50.02 |
+05:57:16.1 |
HIP 100512 |
19.55 |
| 2026-02-21 12:00 |
20:24:06.47 |
+05:58:53.4 |
HIP 100512 |
21.71 |
| 2026-02-22 00:00 |
20:24:22.85 |
+06:00:31.3 |
HIP 100512 |
24.46 |
| 2026-02-22 12:00 |
20:24:39.16 |
+06:02:09.7 |
HIP 100512 |
27.61 |
| 2026-02-23 00:00 |
20:24:55.39 |
+06:03:48.5 |
HIP 100512 |
31.04 |
| 2026-02-23 12:00 |
20:25:11.56 |
+06:05:27.8 |
HIP 100734 |
33.22 |
| 2026-02-24 00:00 |
20:25:27.65 |
+06:07:07.6 |
HIP 100734 |
31.39 |