메타데이터
| 항목 |
값 |
| Designation |
C/1961 T1 (Seki) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1961-10-10T15:34:49.782720Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:14Z |
| Obs used |
15 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1961-11-12.0000000 |
| e |
0.99215002 |
| q (au) |
0.681202 |
| a (au) |
86.777590 |
| i (deg) |
155.712858 |
| Ω (om, deg) |
247.357198 |
| ω (w, deg) |
126.592481 |
| M (ma, deg) |
0.039444 |
밝기
산란 + 전체 선형
$$
M_a = (9.055 + 4.579\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
9.055 |
| n |
4.579 |
| gf |
0.800 |
| gb |
-1.000 |
| k |
0.800 |
| δ90 |
10.000 |
| 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) |
| 2026-07-29 00:00 |
21:00:27.33 |
-39:07:57.3 |
HIP 103832 |
25.48 |
| 2026-07-29 12:00 |
21:00:25.48 |
-39:08:04.1 |
HIP 103832 |
25.85 |
| 2026-07-30 00:00 |
21:00:23.63 |
-39:08:10.7 |
HIP 103504 |
25.75 |
| 2026-07-30 12:00 |
21:00:21.77 |
-39:08:17.3 |
HIP 103504 |
25.42 |
| 2026-07-31 00:00 |
21:00:19.91 |
-39:08:23.9 |
HIP 103504 |
25.09 |
| 2026-07-31 12:00 |
21:00:18.06 |
-39:08:30.3 |
HIP 103504 |
24.76 |
| 2026-08-01 00:00 |
21:00:16.20 |
-39:08:36.7 |
HIP 103504 |
24.43 |
| 2026-08-01 12:00 |
21:00:14.34 |
-39:08:43.0 |
HIP 103504 |
24.10 |
| 2026-08-02 00:00 |
21:00:12.48 |
-39:08:49.3 |
HIP 103504 |
23.77 |
| 2026-08-02 12:00 |
21:00:10.62 |
-39:08:55.5 |
HIP 103504 |
23.44 |
| 2026-08-03 00:00 |
21:00:08.75 |
-39:09:01.6 |
HIP 103504 |
23.12 |
| 2026-08-03 12:00 |
21:00:06.89 |
-39:09:07.6 |
HIP 103504 |
22.79 |
| 2026-08-04 00:00 |
21:00:05.02 |
-39:09:13.6 |
HIP 103504 |
22.47 |
| 2026-08-04 12:00 |
21:00:03.16 |
-39:09:19.5 |
HIP 103504 |
22.15 |
| 2026-08-05 00:00 |
21:00:01.30 |
-39:09:25.4 |
HIP 103504 |
21.83 |
| 2026-08-05 12:00 |
20:59:59.43 |
-39:09:31.1 |
HIP 103504 |
21.51 |
| 2026-08-06 00:00 |
20:59:57.57 |
-39:09:36.8 |
HIP 103504 |
21.19 |
| 2026-08-06 12:00 |
20:59:55.70 |
-39:09:42.4 |
HIP 103504 |
20.87 |
| 2026-08-07 00:00 |
20:59:53.84 |
-39:09:47.9 |
HIP 103504 |
20.56 |
| 2026-08-07 12:00 |
20:59:51.97 |
-39:09:53.4 |
HIP 103504 |
20.24 |
| 2026-08-08 00:00 |
20:59:50.11 |
-39:09:58.8 |
HIP 103504 |
19.93 |
| 2026-08-08 12:00 |
20:59:48.24 |
-39:10:04.1 |
HIP 103504 |
19.62 |
| 2026-08-09 00:00 |
20:59:46.38 |
-39:10:09.3 |
HIP 103504 |
19.31 |
| 2026-08-09 12:00 |
20:59:44.52 |
-39:10:14.5 |
HIP 103504 |
19.01 |
| 2026-08-10 00:00 |
20:59:42.66 |
-39:10:19.6 |
HIP 103504 |
18.70 |
| 2026-08-10 12:00 |
20:59:40.80 |
-39:10:24.6 |
HIP 103504 |
18.40 |
| 2026-08-11 00:00 |
20:59:38.94 |
-39:10:29.5 |
HIP 103504 |
18.10 |
| 2026-08-11 12:00 |
20:59:37.09 |
-39:10:34.4 |
HIP 103504 |
17.81 |
| 2026-08-12 00:00 |
20:59:35.23 |
-39:10:39.1 |
HIP 103504 |
17.51 |
| 2026-08-12 12:00 |
20:59:33.38 |
-39:10:43.8 |
HIP 103504 |
17.22 |
| 2026-08-13 00:00 |
20:59:31.53 |
-39:10:48.5 |
HIP 103504 |
16.93 |
| 2026-08-13 12:00 |
20:59:29.68 |
-39:10:53.0 |
HIP 103504 |
16.65 |
| 2026-08-14 00:00 |
20:59:27.84 |
-39:10:57.4 |
HIP 103504 |
16.36 |
| 2026-08-14 12:00 |
20:59:25.99 |
-39:11:01.8 |
HIP 103504 |
16.08 |
| 2026-08-15 00:00 |
20:59:24.15 |
-39:11:06.1 |
HIP 103504 |
15.81 |
| 2026-08-15 12:00 |
20:59:22.31 |
-39:11:10.3 |
HIP 103504 |
15.53 |
| 2026-08-16 00:00 |
20:59:20.48 |
-39:11:14.5 |
HIP 103504 |
15.26 |
| 2026-08-16 12:00 |
20:59:18.64 |
-39:11:18.5 |
HIP 103504 |
15.00 |
| 2026-08-17 00:00 |
20:59:16.81 |
-39:11:22.5 |
HIP 103504 |
14.73 |
| 2026-08-17 12:00 |
20:59:14.99 |
-39:11:26.4 |
HIP 103504 |
14.48 |
| 2026-08-18 00:00 |
20:59:13.16 |
-39:11:30.2 |
HIP 103504 |
14.22 |
| 2026-08-18 12:00 |
20:59:11.35 |
-39:11:33.9 |
HIP 103504 |
13.97 |
| 2026-08-19 00:00 |
20:59:09.53 |
-39:11:37.5 |
HIP 103504 |
13.73 |