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) |
| 2026-09-20 00:00 |
20:57:26.72 |
-39:12:31.4 |
HIP 103504 |
12.93 |
| 2026-09-20 12:00 |
20:57:25.40 |
-39:12:29.4 |
HIP 103504 |
13.09 |
| 2026-09-21 00:00 |
20:57:24.11 |
-39:12:27.3 |
HIP 103504 |
13.24 |
| 2026-09-21 12:00 |
20:57:22.82 |
-39:12:25.2 |
HIP 103504 |
13.40 |
| 2026-09-22 00:00 |
20:57:21.54 |
-39:12:22.9 |
HIP 103504 |
13.56 |
| 2026-09-22 12:00 |
20:57:20.28 |
-39:12:20.6 |
HIP 103504 |
13.71 |
| 2026-09-23 00:00 |
20:57:19.03 |
-39:12:18.1 |
HIP 103504 |
13.87 |
| 2026-09-23 12:00 |
20:57:17.79 |
-39:12:15.6 |
HIP 103504 |
14.03 |
| 2026-09-24 00:00 |
20:57:16.56 |
-39:12:13.0 |
HIP 103504 |
14.18 |
| 2026-09-24 12:00 |
20:57:15.34 |
-39:12:10.3 |
HIP 103504 |
14.34 |
| 2026-09-25 00:00 |
20:57:14.14 |
-39:12:07.6 |
HIP 103504 |
14.50 |
| 2026-09-25 12:00 |
20:57:12.95 |
-39:12:04.7 |
HIP 103504 |
14.65 |
| 2026-09-26 00:00 |
20:57:11.77 |
-39:12:01.8 |
HIP 103504 |
14.80 |
| 2026-09-26 12:00 |
20:57:10.60 |
-39:11:58.8 |
HIP 103504 |
14.96 |
| 2026-09-27 00:00 |
20:57:09.45 |
-39:11:55.7 |
HIP 103504 |
15.11 |
| 2026-09-27 12:00 |
20:57:08.31 |
-39:11:52.5 |
HIP 103504 |
15.26 |
| 2026-09-28 00:00 |
20:57:07.18 |
-39:11:49.2 |
HIP 103504 |
15.41 |
| 2026-09-28 12:00 |
20:57:06.06 |
-39:11:45.9 |
HIP 103504 |
15.57 |
| 2026-09-29 00:00 |
20:57:04.96 |
-39:11:42.5 |
HIP 103504 |
15.71 |
| 2026-09-29 12:00 |
20:57:03.87 |
-39:11:39.0 |
HIP 103504 |
15.86 |
| 2026-09-30 00:00 |
20:57:02.79 |
-39:11:35.4 |
HIP 103504 |
16.01 |
| 2026-09-30 12:00 |
20:57:01.73 |
-39:11:31.7 |
HIP 103504 |
16.15 |
| 2026-10-01 00:00 |
20:57:00.68 |
-39:11:27.9 |
HIP 103504 |
16.30 |
| 2026-10-01 12:00 |
20:56:59.64 |
-39:11:24.1 |
HIP 103504 |
16.44 |
| 2026-10-02 00:00 |
20:56:58.62 |
-39:11:20.2 |
HIP 103504 |
16.58 |
| 2026-10-02 12:00 |
20:56:57.61 |
-39:11:16.2 |
HIP 103504 |
16.72 |
| 2026-10-03 00:00 |
20:56:56.61 |
-39:11:12.1 |
HIP 103504 |
16.86 |
| 2026-10-03 12:00 |
20:56:55.63 |
-39:11:08.0 |
HIP 103504 |
17.00 |
| 2026-10-04 00:00 |
20:56:54.66 |
-39:11:03.7 |
HIP 103504 |
17.13 |
| 2026-10-04 12:00 |
20:56:53.70 |
-39:10:59.4 |
HIP 103504 |
17.27 |
| 2026-10-05 00:00 |
20:56:52.76 |
-39:10:55.0 |
HIP 103504 |
17.40 |
| 2026-10-05 12:00 |
20:56:51.83 |
-39:10:50.5 |
HIP 103504 |
17.53 |
| 2026-10-06 00:00 |
20:56:50.92 |
-39:10:46.0 |
HIP 103504 |
17.65 |
| 2026-10-06 12:00 |
20:56:50.02 |
-39:10:41.4 |
HIP 103504 |
17.78 |
| 2026-10-07 00:00 |
20:56:49.13 |
-39:10:36.6 |
HIP 103504 |
17.90 |
| 2026-10-07 12:00 |
20:56:48.26 |
-39:10:31.9 |
HIP 103504 |
18.03 |
| 2026-10-08 00:00 |
20:56:47.40 |
-39:10:27.0 |
HIP 103504 |
18.15 |
| 2026-10-08 12:00 |
20:56:46.56 |
-39:10:22.1 |
HIP 103504 |
18.27 |
| 2026-10-09 00:00 |
20:56:45.73 |
-39:10:17.0 |
HIP 103504 |
18.38 |
| 2026-10-09 12:00 |
20:56:44.92 |
-39:10:11.9 |
HIP 103504 |
18.50 |
| 2026-10-10 00:00 |
20:56:44.12 |
-39:10:06.8 |
HIP 103504 |
18.61 |
| 2026-10-10 12:00 |
20:56:43.33 |
-39:10:01.5 |
HIP 103504 |
18.72 |
| 2026-10-11 00:00 |
20:56:42.56 |
-39:09:56.2 |
HIP 103504 |
18.83 |