メタデータ
| 項目 |
値 |
| Designation |
C/2023 V4 (Camarasa-Duszanowicz) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2024-05-30T08:44:17.678400Z |
| Orbit solution date (soln_date, UTC) |
2026-07-28T14:12:17Z |
| Obs used |
1135 |
| NEO |
- |
| M1 |
11.600 |
| K1 |
10.250 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2023-11-05T01:19:50.016000Z |
| Discovery magnitude (MPC) |
18.70 G |
| Discovery observatory (MPC) |
L87 · Moonbase South Observatory, Hakos |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2024-05-03.0000000 |
| e |
1.00099958 |
| q (au) |
1.121703 |
| a (au) |
-1122.177910 |
| i (deg) |
67.130006 |
| Ω (om, deg) |
66.325908 |
| ω (w, deg) |
50.854186 |
| M (ma, deg) |
-0.000717 |
等級
散乱 + 全体線形
$$
M_a = (11.558 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
11.558 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.752 |
| 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 |
| 2023-11-05 |
2023-12-07 |
+2.1125 |
-0.804 |
| 2023-12-07 |
2024-01-14 |
+3.0884 |
-1.377 |
| 2024-01-14 |
2024-02-06 |
+0.7897 |
-0.625 |
| 2024-02-06 |
2024-03-08 |
+1.4322 |
-0.963 |
| 2024-03-08 |
2024-05-29 |
+2.9015 |
-1.144 |
| 2024-06-01 |
2025-05-23 |
+2.5990 |
-0.952 |
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) |
| 2026-09-20 00:00 |
16:00:18.99 |
-28:46:36.6 |
HIP 78480 |
17.96 |
| 2026-09-20 12:00 |
16:00:26.32 |
-28:47:02.7 |
HIP 78480 |
16.60 |
| 2026-09-21 00:00 |
16:00:33.75 |
-28:47:29.2 |
HIP 78480 |
15.28 |
| 2026-09-21 12:00 |
16:00:41.28 |
-28:47:55.9 |
HIP 78480 |
14.03 |
| 2026-09-22 00:00 |
16:00:48.89 |
-28:48:23.0 |
HIP 78480 |
12.87 |
| 2026-09-22 12:00 |
16:00:56.60 |
-28:48:50.3 |
HIP 78480 |
11.84 |
| 2026-09-23 00:00 |
16:01:04.39 |
-28:49:17.9 |
HIP 78480 |
10.98 |
| 2026-09-23 12:00 |
16:01:12.28 |
-28:49:45.9 |
HIP 78480 |
10.35 |
| 2026-09-24 00:00 |
16:01:20.26 |
-28:50:14.1 |
HIP 78480 |
10.00 |
| 2026-09-24 12:00 |
16:01:28.32 |
-28:50:42.6 |
HIP 78480 |
9.98 |
| 2026-09-25 00:00 |
16:01:36.47 |
-28:51:11.4 |
HIP 78480 |
10.29 |
| 2026-09-25 12:00 |
16:01:44.71 |
-28:51:40.5 |
HIP 78480 |
10.91 |
| 2026-09-26 00:00 |
16:01:53.04 |
-28:52:09.9 |
HIP 78480 |
11.82 |
| 2026-09-26 12:00 |
16:02:01.45 |
-28:52:39.5 |
HIP 78480 |
12.94 |
| 2026-09-27 00:00 |
16:02:09.94 |
-28:53:09.5 |
HIP 78480 |
14.25 |
| 2026-09-27 12:00 |
16:02:18.52 |
-28:53:39.7 |
HIP 78575 |
15.19 |
| 2026-09-28 00:00 |
16:02:27.19 |
-28:54:10.2 |
HIP 78575 |
14.23 |
| 2026-09-28 12:00 |
16:02:35.94 |
-28:54:41.0 |
HIP 78575 |
13.48 |
| 2026-09-29 00:00 |
16:02:44.77 |
-28:55:12.0 |
HIP 78575 |
13.00 |
| 2026-09-29 12:00 |
16:02:53.68 |
-28:55:43.4 |
HIP 78575 |
12.81 |
| 2026-09-30 00:00 |
16:03:02.68 |
-28:56:15.0 |
HIP 78575 |
12.94 |
| 2026-09-30 12:00 |
16:03:11.75 |
-28:56:46.9 |
HIP 78575 |
13.39 |
| 2026-10-01 00:00 |
16:03:20.91 |
-28:57:19.0 |
HIP 78575 |
14.13 |
| 2026-10-01 12:00 |
16:03:30.14 |
-28:57:51.5 |
HIP 78743 |
13.37 |
| 2026-10-02 00:00 |
16:03:39.46 |
-28:58:24.2 |
HIP 78743 |
11.46 |
| 2026-10-02 12:00 |
16:03:48.85 |
-28:58:57.1 |
HIP 78743 |
9.63 |
| 2026-10-03 00:00 |
16:03:58.32 |
-28:59:30.4 |
HIP 78743 |
7.94 |
| 2026-10-03 12:00 |
16:04:07.87 |
-29:00:03.9 |
HIP 78743 |
6.50 |
| 2026-10-04 00:00 |
16:04:17.49 |
-29:00:37.7 |
HIP 78743 |
5.56 |
| 2026-10-04 12:00 |
16:04:27.20 |
-29:01:11.7 |
HIP 78743 |
5.38 |
| 2026-10-05 00:00 |
16:04:36.97 |
-29:01:46.0 |
HIP 78743 |
6.07 |
| 2026-10-05 12:00 |
16:04:46.83 |
-29:02:20.6 |
HIP 78743 |
7.39 |
| 2026-10-06 00:00 |
16:04:56.75 |
-29:02:55.4 |
HIP 78743 |
9.09 |
| 2026-10-06 12:00 |
16:05:06.75 |
-29:03:30.5 |
HIP 78743 |
11.00 |
| 2026-10-07 00:00 |
16:05:16.82 |
-29:04:05.8 |
HIP 78743 |
13.04 |
| 2026-10-07 12:00 |
16:05:26.97 |
-29:04:41.4 |
HIP 78743 |
15.17 |
| 2026-10-08 00:00 |
16:05:37.19 |
-29:05:17.3 |
HIP 78743 |
17.35 |
| 2026-10-08 12:00 |
16:05:47.48 |
-29:05:53.4 |
HIP 78743 |
19.58 |
| 2026-10-09 00:00 |
16:05:57.83 |
-29:06:29.7 |
HIP 78743 |
21.84 |
| 2026-10-09 12:00 |
16:06:08.26 |
-29:07:06.3 |
HIP 78988 |
22.47 |
| 2026-10-10 00:00 |
16:06:18.76 |
-29:07:43.2 |
HIP 78988 |
21.28 |
| 2026-10-10 12:00 |
16:06:29.32 |
-29:08:20.3 |
HIP 78988 |
20.30 |
| 2026-10-11 00:00 |
16:06:39.95 |
-29:08:57.6 |
HIP 78988 |
19.56 |