メタデータ
| 項目 |
値 |
| Designation |
C/2024 V1 (Borisov) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2025-04-04T02:28:15.268800Z |
| Orbit solution date (soln_date, UTC) |
2025-06-26T10:13:10Z |
| Obs used |
422 |
| NEO |
- |
| M1 |
13.600 |
| K1 |
9.250 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-11-08T01:11:04.704000Z |
| Discovery magnitude (MPC) |
19.30 G |
| Discovery observatory (MPC) |
L51 · MARGO, Nauchnyi |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2025-02-14.0000000 |
| e |
0.99016034 |
| q (au) |
2.318468 |
| a (au) |
235.624767 |
| i (deg) |
54.623265 |
| Ω (om, deg) |
328.195162 |
| ω (w, deg) |
168.663803 |
| M (ma, deg) |
359.986619 |
等級
散乱 + 全体線形
$$
M_a = (14.076 + 4.289\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
14.076 |
| n |
4.289 |
| gf |
1.000 |
| gb |
-0.585 |
| 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) |
| 2026-09-20 00:00 |
12:57:25.63 |
-62:34:33.6 |
HIP 63112 |
10.78 |
| 2026-09-20 12:00 |
12:58:13.90 |
-62:35:55.5 |
HIP 63112 |
16.06 |
| 2026-09-21 00:00 |
12:59:02.22 |
-62:37:18.2 |
HIP 63499 |
11.59 |
| 2026-09-21 12:00 |
12:59:50.61 |
-62:38:41.8 |
HIP 63499 |
5.86 |
| 2026-09-22 00:00 |
13:00:39.06 |
-62:40:06.3 |
HIP 63499 |
0.23 |
| 2026-09-22 12:00 |
13:01:27.57 |
-62:41:31.6 |
HIP 63499 |
5.63 |
| 2026-09-23 00:00 |
13:02:16.13 |
-62:42:57.8 |
HIP 63499 |
11.38 |
| 2026-09-23 12:00 |
13:03:04.76 |
-62:44:24.7 |
HIP 63554 |
16.04 |
| 2026-09-24 00:00 |
13:03:53.44 |
-62:45:52.5 |
HIP 63554 |
19.66 |
| 2026-09-24 12:00 |
13:04:42.19 |
-62:47:21.2 |
HIP 64018 |
20.25 |
| 2026-09-25 00:00 |
13:05:30.99 |
-62:48:50.6 |
HIP 64018 |
15.06 |
| 2026-09-25 12:00 |
13:06:19.85 |
-62:50:20.8 |
HIP 64018 |
10.47 |
| 2026-09-26 00:00 |
13:07:08.77 |
-62:51:51.8 |
HIP 64018 |
7.66 |
| 2026-09-26 12:00 |
13:07:57.75 |
-62:53:23.6 |
HIP 64018 |
8.61 |
| 2026-09-27 00:00 |
13:08:46.78 |
-62:54:56.2 |
HIP 64018 |
12.50 |
| 2026-09-27 12:00 |
13:09:35.88 |
-62:56:29.6 |
HIP 64138 |
17.36 |
| 2026-09-28 00:00 |
13:10:25.03 |
-62:58:03.8 |
HIP 64138 |
18.80 |
| 2026-09-28 12:00 |
13:11:14.24 |
-62:59:38.7 |
HIP 64529 |
17.25 |
| 2026-09-29 00:00 |
13:12:03.51 |
-63:01:14.3 |
HIP 64529 |
11.49 |
| 2026-09-29 12:00 |
13:12:52.84 |
-63:02:50.8 |
HIP 64529 |
5.83 |
| 2026-09-30 00:00 |
13:13:42.22 |
-63:04:27.9 |
HIP 64529 |
1.88 |
| 2026-09-30 12:00 |
13:14:31.66 |
-63:06:05.9 |
HIP 64529 |
6.39 |
| 2026-10-01 00:00 |
13:15:21.16 |
-63:07:44.5 |
HIP 64529 |
12.09 |
| 2026-10-01 12:00 |
13:16:10.72 |
-63:09:24.0 |
HIP 64529 |
17.87 |
| 2026-10-02 00:00 |
13:17:00.34 |
-63:11:04.1 |
HIP 64914 |
18.22 |
| 2026-10-02 12:00 |
13:17:50.01 |
-63:12:45.0 |
HIP 64914 |
14.59 |
| 2026-10-03 00:00 |
13:18:39.74 |
-63:14:26.6 |
HIP 64914 |
12.70 |
| 2026-10-03 12:00 |
13:19:29.52 |
-63:16:08.9 |
HIP 64914 |
13.33 |
| 2026-10-04 00:00 |
13:20:19.37 |
-63:17:51.9 |
HIP 64914 |
16.18 |
| 2026-10-04 12:00 |
13:21:09.27 |
-63:19:35.6 |
HIP 65022 |
19.89 |
| 2026-10-05 00:00 |
13:21:59.23 |
-63:21:20.1 |
HIP 65431 |
18.41 |
| 2026-10-05 12:00 |
13:22:49.24 |
-63:23:05.2 |
HIP 65431 |
13.66 |
| 2026-10-06 00:00 |
13:23:39.31 |
-63:24:51.1 |
HIP 65431 |
10.18 |
| 2026-10-06 12:00 |
13:24:29.44 |
-63:26:37.6 |
HIP 65431 |
9.50 |
| 2026-10-07 00:00 |
13:25:19.62 |
-63:28:24.8 |
HIP 65431 |
12.11 |
| 2026-10-07 12:00 |
13:26:09.85 |
-63:30:12.7 |
HIP 65431 |
16.53 |
| 2026-10-08 00:00 |
13:27:00.14 |
-63:32:01.3 |
HIP 65647 |
17.37 |
| 2026-10-08 12:00 |
13:27:50.48 |
-63:33:50.6 |
HIP 65647 |
15.33 |
| 2026-10-09 00:00 |
13:28:40.88 |
-63:35:40.5 |
HIP 65647 |
15.40 |
| 2026-10-09 12:00 |
13:29:31.33 |
-63:37:31.1 |
HIP 65777 |
15.20 |
| 2026-10-10 00:00 |
13:30:21.84 |
-63:39:22.4 |
HIP 65777 |
15.56 |
| 2026-10-10 12:00 |
13:31:12.39 |
-63:41:14.3 |
HIP 66109 |
12.70 |
| 2026-10-11 00:00 |
13:32:03.00 |
-63:43:06.8 |
HIP 66109 |
7.74 |