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) |
| 2026-07-29 00:00 |
15:58:11.93 |
-28:30:15.4 |
HIP 78245 |
13.05 |
| 2026-07-29 12:00 |
15:58:06.25 |
-28:30:09.3 |
HIP 78245 |
13.47 |
| 2026-07-30 00:00 |
15:58:00.71 |
-28:30:03.4 |
HIP 78245 |
13.98 |
| 2026-07-30 12:00 |
15:57:55.31 |
-28:29:57.7 |
HIP 78245 |
14.55 |
| 2026-07-31 00:00 |
15:57:50.05 |
-28:29:52.3 |
HIP 78245 |
15.18 |
| 2026-07-31 12:00 |
15:57:44.93 |
-28:29:47.1 |
HIP 78245 |
15.86 |
| 2026-08-01 00:00 |
15:57:39.95 |
-28:29:42.1 |
HIP 78245 |
16.56 |
| 2026-08-01 12:00 |
15:57:35.11 |
-28:29:37.4 |
HIP 78245 |
17.29 |
| 2026-08-02 00:00 |
15:57:30.41 |
-28:29:32.9 |
HIP 78245 |
18.02 |
| 2026-08-02 12:00 |
15:57:25.85 |
-28:29:28.7 |
HIP 78245 |
18.77 |
| 2026-08-03 00:00 |
15:57:21.43 |
-28:29:24.7 |
HIP 78245 |
19.51 |
| 2026-08-03 12:00 |
15:57:17.15 |
-28:29:20.9 |
HIP 78245 |
20.25 |
| 2026-08-04 00:00 |
15:57:13.01 |
-28:29:17.5 |
HIP 78006 |
20.82 |
| 2026-08-04 12:00 |
15:57:09.01 |
-28:29:14.2 |
HIP 78006 |
19.99 |
| 2026-08-05 00:00 |
15:57:05.15 |
-28:29:11.3 |
HIP 78006 |
19.19 |
| 2026-08-05 12:00 |
15:57:01.42 |
-28:29:08.6 |
HIP 78006 |
18.42 |
| 2026-08-06 00:00 |
15:56:57.84 |
-28:29:06.2 |
HIP 78006 |
17.68 |
| 2026-08-06 12:00 |
15:56:54.39 |
-28:29:04.0 |
HIP 78006 |
16.99 |
| 2026-08-07 00:00 |
15:56:51.09 |
-28:29:02.1 |
HIP 78006 |
16.32 |
| 2026-08-07 12:00 |
15:56:47.92 |
-28:29:00.5 |
HIP 78006 |
15.69 |
| 2026-08-08 00:00 |
15:56:44.89 |
-28:28:59.2 |
HIP 78006 |
15.10 |
| 2026-08-08 12:00 |
15:56:42.00 |
-28:28:58.1 |
HIP 78006 |
14.54 |
| 2026-08-09 00:00 |
15:56:39.25 |
-28:28:57.3 |
HIP 78006 |
14.01 |
| 2026-08-09 12:00 |
15:56:36.64 |
-28:28:56.9 |
HIP 78006 |
13.52 |
| 2026-08-10 00:00 |
15:56:34.16 |
-28:28:56.7 |
HIP 78006 |
13.06 |
| 2026-08-10 12:00 |
15:56:31.82 |
-28:28:56.8 |
HIP 78006 |
12.64 |
| 2026-08-11 00:00 |
15:56:29.62 |
-28:28:57.1 |
HIP 78006 |
12.25 |
| 2026-08-11 12:00 |
15:56:27.56 |
-28:28:57.8 |
HIP 78006 |
11.90 |
| 2026-08-12 00:00 |
15:56:25.63 |
-28:28:58.8 |
HIP 78006 |
11.58 |
| 2026-08-12 12:00 |
15:56:23.84 |
-28:29:00.1 |
HIP 78006 |
11.29 |
| 2026-08-13 00:00 |
15:56:22.19 |
-28:29:01.7 |
HIP 78006 |
11.04 |
| 2026-08-13 12:00 |
15:56:20.67 |
-28:29:03.5 |
HIP 78006 |
10.81 |
| 2026-08-14 00:00 |
15:56:19.29 |
-28:29:05.7 |
HIP 78006 |
10.62 |
| 2026-08-14 12:00 |
15:56:18.04 |
-28:29:08.2 |
HIP 78006 |
10.46 |
| 2026-08-15 00:00 |
15:56:16.93 |
-28:29:11.0 |
HIP 78006 |
10.32 |
| 2026-08-15 12:00 |
15:56:15.96 |
-28:29:14.1 |
HIP 78006 |
10.22 |
| 2026-08-16 00:00 |
15:56:15.11 |
-28:29:17.5 |
HIP 78006 |
10.14 |
| 2026-08-16 12:00 |
15:56:14.40 |
-28:29:21.3 |
HIP 78006 |
10.08 |
| 2026-08-17 00:00 |
15:56:13.83 |
-28:29:25.3 |
HIP 78006 |
10.05 |
| 2026-08-17 12:00 |
15:56:13.39 |
-28:29:29.6 |
HIP 78006 |
10.05 |
| 2026-08-18 00:00 |
15:56:13.08 |
-28:29:34.3 |
HIP 78006 |
10.07 |
| 2026-08-18 12:00 |
15:56:12.90 |
-28:29:39.3 |
HIP 78006 |
10.11 |
| 2026-08-19 00:00 |
15:56:12.85 |
-28:29:44.6 |
HIP 78006 |
10.17 |