メタデータ
| 項目 |
値 |
| Designation |
308P/Lagerkvist-Carsenty |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2015-05-13T16:53:46.351680Z |
| Orbit solution date (soln_date, UTC) |
2024-10-10T19:55:49Z |
| Obs used |
369 |
| NEO |
- |
| M1 |
10.700 |
| K1 |
10.000 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2014-08-16T04:49:51.110400Z |
| Discovery magnitude (MPC) |
20.70 i |
| Discovery observatory (MPC) |
W84 · Cerro Tololo-DECam |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2007-05-13.0000000 |
| e |
0.36222272 |
| q (au) |
4.256979 |
| a (au) |
6.674710 |
| i (deg) |
4.840175 |
| Ω (om, deg) |
63.143956 |
| ω (w, deg) |
333.650183 |
| M (ma, deg) |
192.952390 |
等級
散乱 + 全体線形
$$
M_a = (9.986 + 3.995\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
9.986 |
| n |
3.995 |
| gf |
0.999 |
| gb |
-0.962 |
| 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) |
| 2026-09-20 00:00 |
16:02:15.64 |
-21:11:15.5 |
HIP 78467 |
16.38 |
| 2026-09-20 12:00 |
16:02:25.69 |
-21:11:47.0 |
HIP 78467 |
18.77 |
| 2026-09-21 00:00 |
16:02:35.83 |
-21:12:18.7 |
HIP 78467 |
21.18 |
| 2026-09-21 12:00 |
16:02:46.06 |
-21:12:50.7 |
HIP 78467 |
23.62 |
| 2026-09-22 00:00 |
16:02:56.39 |
-21:13:22.8 |
HIP 78467 |
26.08 |
| 2026-09-22 12:00 |
16:03:06.82 |
-21:13:55.2 |
HIP 78467 |
28.57 |
| 2026-09-23 00:00 |
16:03:17.34 |
-21:14:27.8 |
HIP 78467 |
31.07 |
| 2026-09-23 12:00 |
16:03:27.95 |
-21:15:00.6 |
HIP 78467 |
33.60 |
| 2026-09-24 00:00 |
16:03:38.66 |
-21:15:33.7 |
HIP 78467 |
36.15 |
| 2026-09-24 12:00 |
16:03:49.46 |
-21:16:06.9 |
HIP 78467 |
38.73 |
| 2026-09-25 00:00 |
16:04:00.35 |
-21:16:40.4 |
HIP 78708 |
38.98 |
| 2026-09-25 12:00 |
16:04:11.33 |
-21:17:14.0 |
HIP 78872 |
36.92 |
| 2026-09-26 00:00 |
16:04:22.40 |
-21:17:47.9 |
HIP 78872 |
34.77 |
| 2026-09-26 12:00 |
16:04:33.57 |
-21:18:21.9 |
HIP 78872 |
32.67 |
| 2026-09-27 00:00 |
16:04:44.82 |
-21:18:56.2 |
HIP 78872 |
30.65 |
| 2026-09-27 12:00 |
16:04:56.17 |
-21:19:30.7 |
HIP 78872 |
28.72 |
| 2026-09-28 00:00 |
16:05:07.60 |
-21:20:05.3 |
HIP 78872 |
26.91 |
| 2026-09-28 12:00 |
16:05:19.13 |
-21:20:40.2 |
HIP 78872 |
25.25 |
| 2026-09-29 00:00 |
16:05:30.74 |
-21:21:15.2 |
HIP 78872 |
23.78 |
| 2026-09-29 12:00 |
16:05:42.44 |
-21:21:50.4 |
HIP 78872 |
22.56 |
| 2026-09-30 00:00 |
16:05:54.22 |
-21:22:25.8 |
HIP 78872 |
21.61 |
| 2026-09-30 12:00 |
16:06:06.10 |
-21:23:01.4 |
HIP 78872 |
21.01 |
| 2026-10-01 00:00 |
16:06:18.06 |
-21:23:37.2 |
HIP 79020 |
20.19 |
| 2026-10-01 12:00 |
16:06:30.10 |
-21:24:13.1 |
HIP 79020 |
17.36 |
| 2026-10-02 00:00 |
16:06:42.23 |
-21:24:49.3 |
HIP 79020 |
14.53 |
| 2026-10-02 12:00 |
16:06:54.45 |
-21:25:25.6 |
HIP 79020 |
11.70 |
| 2026-10-03 00:00 |
16:07:06.75 |
-21:26:02.0 |
HIP 79020 |
8.92 |
| 2026-10-03 12:00 |
16:07:19.13 |
-21:26:38.7 |
HIP 79020 |
6.24 |
| 2026-10-04 00:00 |
16:07:31.60 |
-21:27:15.5 |
HIP 79020 |
3.95 |
| 2026-10-04 12:00 |
16:07:44.15 |
-21:27:52.5 |
HIP 79020 |
3.15 |
| 2026-10-05 00:00 |
16:07:56.79 |
-21:28:29.6 |
HIP 79020 |
4.71 |
| 2026-10-05 12:00 |
16:08:09.51 |
-21:29:06.9 |
HIP 79020 |
7.26 |
| 2026-10-06 00:00 |
16:08:22.30 |
-21:29:44.3 |
HIP 79020 |
10.09 |
| 2026-10-06 12:00 |
16:08:35.18 |
-21:30:21.9 |
HIP 79020 |
13.04 |
| 2026-10-07 00:00 |
16:08:48.14 |
-21:30:59.7 |
HIP 79020 |
16.05 |
| 2026-10-07 12:00 |
16:09:01.18 |
-21:31:37.6 |
HIP 79020 |
19.10 |
| 2026-10-08 00:00 |
16:09:14.30 |
-21:32:15.6 |
HIP 79020 |
22.18 |
| 2026-10-08 12:00 |
16:09:27.50 |
-21:32:53.8 |
HIP 79146 |
23.74 |
| 2026-10-09 00:00 |
16:09:40.78 |
-21:33:32.2 |
HIP 79146 |
23.70 |
| 2026-10-09 12:00 |
16:09:54.13 |
-21:34:10.6 |
HIP 79335 |
22.17 |
| 2026-10-10 00:00 |
16:10:07.56 |
-21:34:49.2 |
HIP 79335 |
19.03 |
| 2026-10-10 12:00 |
16:10:21.07 |
-21:35:28.0 |
HIP 79335 |
15.88 |
| 2026-10-11 00:00 |
16:10:34.66 |
-21:36:06.8 |
HIP 79335 |
12.75 |