메타데이터
| 항목 |
값 |
| Designation |
C/1974 O1 (Cesco) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1974-05-12T23:37:48.135360Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:22Z |
| Obs used |
18 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1974-08-21.0000000 |
| e |
0.97938205 |
| q (au) |
1.372893 |
| a (au) |
66.587290 |
| i (deg) |
173.158463 |
| Ω (om, deg) |
165.740646 |
| ω (w, deg) |
176.764065 |
| M (ma, deg) |
0.181420 |
밝기
산란 + 전체 선형
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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) |
| 2026-06-01 00:00 |
11:55:49.13 |
-01:26:59.4 |
HIP 58191 |
3.07 |
| 2026-06-01 12:00 |
11:55:48.57 |
-01:26:54.9 |
HIP 58191 |
3.19 |
| 2026-06-02 00:00 |
11:55:48.03 |
-01:26:50.5 |
HIP 58191 |
3.32 |
| 2026-06-02 12:00 |
11:55:47.50 |
-01:26:46.1 |
HIP 58191 |
3.45 |
| 2026-06-03 00:00 |
11:55:46.99 |
-01:26:41.9 |
HIP 58191 |
3.57 |
| 2026-06-03 12:00 |
11:55:46.48 |
-01:26:37.7 |
HIP 58191 |
3.69 |
| 2026-06-04 00:00 |
11:55:45.99 |
-01:26:33.6 |
HIP 58191 |
3.81 |
| 2026-06-04 12:00 |
11:55:45.52 |
-01:26:29.6 |
HIP 58191 |
3.93 |
| 2026-06-05 00:00 |
11:55:45.05 |
-01:26:25.7 |
HIP 58191 |
4.05 |
| 2026-06-05 12:00 |
11:55:44.60 |
-01:26:21.8 |
HIP 58191 |
4.17 |
| 2026-06-06 00:00 |
11:55:44.16 |
-01:26:18.0 |
HIP 58191 |
4.28 |
| 2026-06-06 12:00 |
11:55:43.74 |
-01:26:14.4 |
HIP 58191 |
4.39 |
| 2026-06-07 00:00 |
11:55:43.33 |
-01:26:10.8 |
HIP 58191 |
4.49 |
| 2026-06-07 12:00 |
11:55:42.93 |
-01:26:07.3 |
HIP 58191 |
4.60 |
| 2026-06-08 00:00 |
11:55:42.55 |
-01:26:03.8 |
HIP 58191 |
4.70 |
| 2026-06-08 12:00 |
11:55:42.18 |
-01:26:00.5 |
HIP 58191 |
4.80 |
| 2026-06-09 00:00 |
11:55:41.82 |
-01:25:57.2 |
HIP 58191 |
4.89 |
| 2026-06-09 12:00 |
11:55:41.47 |
-01:25:54.1 |
HIP 58191 |
4.98 |
| 2026-06-10 00:00 |
11:55:41.14 |
-01:25:51.0 |
HIP 58191 |
5.07 |
| 2026-06-10 12:00 |
11:55:40.82 |
-01:25:48.0 |
HIP 58191 |
5.16 |
| 2026-06-11 00:00 |
11:55:40.52 |
-01:25:45.1 |
HIP 58191 |
5.24 |
| 2026-06-11 12:00 |
11:55:40.23 |
-01:25:42.3 |
HIP 58191 |
5.32 |
| 2026-06-12 00:00 |
11:55:39.95 |
-01:25:39.5 |
HIP 58191 |
5.39 |
| 2026-06-12 12:00 |
11:55:39.69 |
-01:25:36.9 |
HIP 58191 |
5.47 |
| 2026-06-13 00:00 |
11:55:39.44 |
-01:25:34.3 |
HIP 58191 |
5.54 |
| 2026-06-13 12:00 |
11:55:39.20 |
-01:25:31.8 |
HIP 58191 |
5.60 |
| 2026-06-14 00:00 |
11:55:38.98 |
-01:25:29.4 |
HIP 58191 |
5.66 |
| 2026-06-14 12:00 |
11:55:38.77 |
-01:25:27.1 |
HIP 58191 |
5.72 |
| 2026-06-15 00:00 |
11:55:38.58 |
-01:25:24.9 |
HIP 58191 |
5.78 |
| 2026-06-15 12:00 |
11:55:38.39 |
-01:25:22.8 |
HIP 58191 |
5.83 |
| 2026-06-16 00:00 |
11:55:38.22 |
-01:25:20.8 |
HIP 58191 |
5.88 |
| 2026-06-16 12:00 |
11:55:38.07 |
-01:25:18.8 |
HIP 58191 |
5.92 |
| 2026-06-17 00:00 |
11:55:37.93 |
-01:25:17.0 |
HIP 58191 |
5.96 |
| 2026-06-17 12:00 |
11:55:37.80 |
-01:25:15.2 |
HIP 58191 |
6.00 |
| 2026-06-18 00:00 |
11:55:37.69 |
-01:25:13.5 |
HIP 58191 |
6.03 |
| 2026-06-18 12:00 |
11:55:37.58 |
-01:25:11.9 |
HIP 58191 |
6.06 |
| 2026-06-19 00:00 |
11:55:37.50 |
-01:25:10.4 |
HIP 58191 |
6.09 |
| 2026-06-19 12:00 |
11:55:37.42 |
-01:25:09.0 |
HIP 58191 |
6.11 |
| 2026-06-20 00:00 |
11:55:37.36 |
-01:25:07.7 |
HIP 58191 |
6.13 |
| 2026-06-20 12:00 |
11:55:37.32 |
-01:25:06.4 |
HIP 58191 |
6.15 |
| 2026-06-21 00:00 |
11:55:37.28 |
-01:25:05.3 |
HIP 58191 |
6.16 |
| 2026-06-21 12:00 |
11:55:37.26 |
-01:25:04.2 |
HIP 58191 |
6.17 |
| 2026-06-22 00:00 |
11:55:37.26 |
-01:25:03.2 |
HIP 58191 |
6.18 |