메타데이터
| 항목 |
값 |
| Designation |
C/1978 T1 (Seargent) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1978-09-14T20:22:48.953280Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:27Z |
| Obs used |
33 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1978-10-15.0000000 |
| e |
0.99833325 |
| q (au) |
0.369876 |
| a (au) |
221.914124 |
| i (deg) |
67.828275 |
| Ω (om, deg) |
41.774963 |
| ω (w, deg) |
207.756634 |
| M (ma, deg) |
0.008989 |
밝기
산란 + 전체 선형
$$
M_a = (8.252 + 3.969\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
8.252 |
| n |
3.969 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
1.000 |
| δ90 |
1.000 |
| 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 |
02:48:28.48 |
+35:39:40.9 |
HIP 13157 |
15.23 |
| 2026-07-29 12:00 |
02:48:28.76 |
+35:39:50.2 |
HIP 13157 |
15.07 |
| 2026-07-30 00:00 |
02:48:29.02 |
+35:39:59.5 |
HIP 13157 |
14.91 |
| 2026-07-30 12:00 |
02:48:29.27 |
+35:40:08.7 |
HIP 13157 |
14.76 |
| 2026-07-31 00:00 |
02:48:29.50 |
+35:40:17.9 |
HIP 13157 |
14.60 |
| 2026-07-31 12:00 |
02:48:29.71 |
+35:40:27.1 |
HIP 13157 |
14.45 |
| 2026-08-01 00:00 |
02:48:29.91 |
+35:40:36.2 |
HIP 13157 |
14.31 |
| 2026-08-01 12:00 |
02:48:30.10 |
+35:40:45.2 |
HIP 13157 |
14.16 |
| 2026-08-02 00:00 |
02:48:30.26 |
+35:40:54.2 |
HIP 13157 |
14.02 |
| 2026-08-02 12:00 |
02:48:30.41 |
+35:41:03.2 |
HIP 13157 |
13.88 |
| 2026-08-03 00:00 |
02:48:30.55 |
+35:41:12.1 |
HIP 13157 |
13.75 |
| 2026-08-03 12:00 |
02:48:30.67 |
+35:41:20.9 |
HIP 13157 |
13.62 |
| 2026-08-04 00:00 |
02:48:30.77 |
+35:41:29.7 |
HIP 13157 |
13.49 |
| 2026-08-04 12:00 |
02:48:30.86 |
+35:41:38.5 |
HIP 13157 |
13.36 |
| 2026-08-05 00:00 |
02:48:30.93 |
+35:41:47.2 |
HIP 13157 |
13.24 |
| 2026-08-05 12:00 |
02:48:30.98 |
+35:41:55.8 |
HIP 13157 |
13.12 |
| 2026-08-06 00:00 |
02:48:31.02 |
+35:42:04.4 |
HIP 13157 |
13.00 |
| 2026-08-06 12:00 |
02:48:31.04 |
+35:42:12.9 |
HIP 13157 |
12.89 |
| 2026-08-07 00:00 |
02:48:31.04 |
+35:42:21.4 |
HIP 13157 |
12.77 |
| 2026-08-07 12:00 |
02:48:31.03 |
+35:42:29.8 |
HIP 13157 |
12.67 |
| 2026-08-08 00:00 |
02:48:31.00 |
+35:42:38.2 |
HIP 13157 |
12.56 |
| 2026-08-08 12:00 |
02:48:30.96 |
+35:42:46.5 |
HIP 13157 |
12.47 |
| 2026-08-09 00:00 |
02:48:30.90 |
+35:42:54.8 |
HIP 13157 |
12.37 |
| 2026-08-09 12:00 |
02:48:30.82 |
+35:43:03.0 |
HIP 13157 |
12.28 |
| 2026-08-10 00:00 |
02:48:30.73 |
+35:43:11.1 |
HIP 13157 |
12.19 |
| 2026-08-10 12:00 |
02:48:30.62 |
+35:43:19.2 |
HIP 13157 |
12.10 |
| 2026-08-11 00:00 |
02:48:30.50 |
+35:43:27.2 |
HIP 13157 |
12.02 |
| 2026-08-11 12:00 |
02:48:30.35 |
+35:43:35.2 |
HIP 13157 |
11.95 |
| 2026-08-12 00:00 |
02:48:30.19 |
+35:43:43.1 |
HIP 13157 |
11.87 |
| 2026-08-12 12:00 |
02:48:30.02 |
+35:43:50.9 |
HIP 13157 |
11.81 |
| 2026-08-13 00:00 |
02:48:29.83 |
+35:43:58.7 |
HIP 13157 |
11.74 |
| 2026-08-13 12:00 |
02:48:29.62 |
+35:44:06.4 |
HIP 13157 |
11.68 |
| 2026-08-14 00:00 |
02:48:29.39 |
+35:44:14.0 |
HIP 13157 |
11.63 |
| 2026-08-14 12:00 |
02:48:29.15 |
+35:44:21.6 |
HIP 13157 |
11.57 |
| 2026-08-15 00:00 |
02:48:28.90 |
+35:44:29.1 |
HIP 13157 |
11.53 |
| 2026-08-15 12:00 |
02:48:28.62 |
+35:44:36.6 |
HIP 13157 |
11.49 |
| 2026-08-16 00:00 |
02:48:28.33 |
+35:44:44.0 |
HIP 13157 |
11.45 |
| 2026-08-16 12:00 |
02:48:28.03 |
+35:44:51.3 |
HIP 13157 |
11.42 |
| 2026-08-17 00:00 |
02:48:27.70 |
+35:44:58.5 |
HIP 13157 |
11.39 |
| 2026-08-17 12:00 |
02:48:27.36 |
+35:45:05.7 |
HIP 13157 |
11.37 |
| 2026-08-18 00:00 |
02:48:27.01 |
+35:45:12.8 |
HIP 13157 |
11.35 |
| 2026-08-18 12:00 |
02:48:26.64 |
+35:45:19.9 |
HIP 13157 |
11.34 |
| 2026-08-19 00:00 |
02:48:26.25 |
+35:45:26.9 |
HIP 13157 |
11.33 |