메타데이터
| 항목 |
값 |
| Designation |
C/1974 V1 (van den Bergh) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1974-08-08T03:12:11.047680Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:22Z |
| Obs used |
40 |
| NEO |
- |
| M1 |
6.000 |
| K1 |
10.000 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1975-03-15.0000000 |
| e |
1.00366502 |
| q (au) |
6.019170 |
| a (au) |
-1642.329256 |
| i (deg) |
60.856171 |
| Ω (om, deg) |
226.103510 |
| ω (w, deg) |
151.794940 |
| M (ma, deg) |
0.003241 |
밝기
산란 + 전체 선형
$$
M_a = (9.663 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
9.663 |
| n |
2.000 |
| gf |
0.997 |
| gb |
-0.963 |
| k |
1.000 |
| δ90 |
9.952 |
| 파라미터 |
기호 |
범위 |
설명 |
| 태양·지구거리 1 AU에서의 절대등급 |
H0 |
-5 to 20 |
혜성의 고유 밝기 |
| 광도 기울기 파라미터 |
n |
2 to 6 |
태양거리 변화에 따른 밝기 변화율 |
| 전방 산란 비대칭 계수 |
gf |
0.8 to 1 |
전방 산란의 강도 |
| 후방 산란 비대칭 계수 |
gb |
-1 to -0.5 |
후방 산란의 강도 |
| 분할 계수 |
k |
0.8 to 1 |
전·후방 산란 기여도 비율 |
| 먼지/가스 밝기 비 |
δ90 |
1 to 10 |
코마에서 먼지 산란 대비 가스 방출의 상대 기여 |
참고: EPSC-DPS2025-160
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
10:32:37.78 |
-45:47:12.6 |
HIP 51730 |
16.30 |
| 2026-09-20 12:00 |
10:32:39.89 |
-45:47:24.5 |
HIP 51730 |
15.97 |
| 2026-09-21 00:00 |
10:32:41.99 |
-45:47:36.6 |
HIP 51730 |
15.65 |
| 2026-09-21 12:00 |
10:32:44.08 |
-45:47:48.8 |
HIP 51730 |
15.34 |
| 2026-09-22 00:00 |
10:32:46.16 |
-45:48:01.1 |
HIP 51730 |
15.03 |
| 2026-09-22 12:00 |
10:32:48.24 |
-45:48:13.5 |
HIP 51730 |
14.73 |
| 2026-09-23 00:00 |
10:32:50.31 |
-45:48:26.1 |
HIP 51730 |
14.43 |
| 2026-09-23 12:00 |
10:32:52.37 |
-45:48:38.8 |
HIP 51730 |
14.15 |
| 2026-09-24 00:00 |
10:32:54.43 |
-45:48:51.7 |
HIP 51730 |
13.87 |
| 2026-09-24 12:00 |
10:32:56.47 |
-45:49:04.7 |
HIP 51730 |
13.60 |
| 2026-09-25 00:00 |
10:32:58.52 |
-45:49:17.8 |
HIP 51730 |
13.34 |
| 2026-09-25 12:00 |
10:33:00.55 |
-45:49:31.1 |
HIP 51730 |
13.10 |
| 2026-09-26 00:00 |
10:33:02.57 |
-45:49:44.5 |
HIP 51730 |
12.86 |
| 2026-09-26 12:00 |
10:33:04.59 |
-45:49:58.0 |
HIP 51730 |
12.63 |
| 2026-09-27 00:00 |
10:33:06.60 |
-45:50:11.6 |
HIP 51730 |
12.42 |
| 2026-09-27 12:00 |
10:33:08.60 |
-45:50:25.4 |
HIP 51730 |
12.22 |
| 2026-09-28 00:00 |
10:33:10.60 |
-45:50:39.3 |
HIP 51730 |
12.04 |
| 2026-09-28 12:00 |
10:33:12.58 |
-45:50:53.3 |
HIP 51730 |
11.86 |
| 2026-09-29 00:00 |
10:33:14.56 |
-45:51:07.4 |
HIP 51730 |
11.71 |
| 2026-09-29 12:00 |
10:33:16.53 |
-45:51:21.7 |
HIP 51730 |
11.56 |
| 2026-09-30 00:00 |
10:33:18.48 |
-45:51:36.1 |
HIP 51730 |
11.44 |
| 2026-09-30 12:00 |
10:33:20.43 |
-45:51:50.6 |
HIP 51730 |
11.33 |
| 2026-10-01 00:00 |
10:33:22.38 |
-45:52:05.3 |
HIP 51730 |
11.23 |
| 2026-10-01 12:00 |
10:33:24.31 |
-45:52:20.0 |
HIP 51730 |
11.16 |
| 2026-10-02 00:00 |
10:33:26.23 |
-45:52:34.9 |
HIP 51730 |
11.10 |
| 2026-10-02 12:00 |
10:33:28.14 |
-45:52:49.9 |
HIP 51730 |
11.06 |
| 2026-10-03 00:00 |
10:33:30.05 |
-45:53:05.0 |
HIP 51730 |
11.04 |
| 2026-10-03 12:00 |
10:33:31.94 |
-45:53:20.3 |
HIP 51730 |
11.04 |
| 2026-10-04 00:00 |
10:33:33.83 |
-45:53:35.6 |
HIP 51730 |
11.05 |
| 2026-10-04 12:00 |
10:33:35.70 |
-45:53:51.1 |
HIP 51730 |
11.09 |
| 2026-10-05 00:00 |
10:33:37.56 |
-45:54:06.7 |
HIP 51730 |
11.14 |
| 2026-10-05 12:00 |
10:33:39.42 |
-45:54:22.4 |
HIP 51730 |
11.21 |
| 2026-10-06 00:00 |
10:33:41.26 |
-45:54:38.2 |
HIP 51730 |
11.29 |
| 2026-10-06 12:00 |
10:33:43.10 |
-45:54:54.1 |
HIP 51730 |
11.40 |
| 2026-10-07 00:00 |
10:33:44.92 |
-45:55:10.2 |
HIP 51730 |
11.52 |
| 2026-10-07 12:00 |
10:33:46.73 |
-45:55:26.3 |
HIP 51730 |
11.65 |
| 2026-10-08 00:00 |
10:33:48.53 |
-45:55:42.6 |
HIP 51730 |
11.81 |
| 2026-10-08 12:00 |
10:33:50.32 |
-45:55:58.9 |
HIP 51730 |
11.97 |
| 2026-10-09 00:00 |
10:33:52.10 |
-45:56:15.4 |
HIP 51730 |
12.15 |
| 2026-10-09 12:00 |
10:33:53.86 |
-45:56:31.9 |
HIP 51730 |
12.35 |
| 2026-10-10 00:00 |
10:33:55.62 |
-45:56:48.6 |
HIP 51805 |
12.34 |
| 2026-10-10 12:00 |
10:33:57.36 |
-45:57:05.4 |
HIP 51805 |
12.12 |
| 2026-10-11 00:00 |
10:33:59.10 |
-45:57:22.3 |
HIP 51805 |
11.91 |