메타데이터
| 항목 |
값 |
| Designation |
C/1899 E1 (Swift) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1899-04-13T11:27:00.100800Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:28:55Z |
| Obs used |
151 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1899-05-04.0000000 |
| e |
1.00032525 |
| q (au) |
0.326562 |
| a (au) |
-1004.044294 |
| i (deg) |
146.270427 |
| Ω (om, deg) |
26.405893 |
| ω (w, deg) |
8.705696 |
| M (ma, deg) |
0.000636 |
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 |
13:25:00.02 |
-10:50:27.9 |
HIP 65474 |
19.42 |
| 2026-06-01 12:00 |
13:24:59.49 |
-10:50:24.5 |
HIP 65474 |
19.49 |
| 2026-06-02 00:00 |
13:24:58.97 |
-10:50:21.2 |
HIP 65474 |
19.57 |
| 2026-06-02 12:00 |
13:24:58.45 |
-10:50:17.9 |
HIP 65474 |
19.64 |
| 2026-06-03 00:00 |
13:24:57.94 |
-10:50:14.6 |
HIP 65474 |
19.72 |
| 2026-06-03 12:00 |
13:24:57.43 |
-10:50:11.3 |
HIP 65474 |
19.79 |
| 2026-06-04 00:00 |
13:24:56.92 |
-10:50:08.1 |
HIP 65474 |
19.87 |
| 2026-06-04 12:00 |
13:24:56.42 |
-10:50:04.9 |
HIP 65474 |
19.94 |
| 2026-06-05 00:00 |
13:24:55.93 |
-10:50:01.7 |
HIP 65474 |
20.02 |
| 2026-06-05 12:00 |
13:24:55.44 |
-10:49:58.6 |
HIP 65474 |
20.09 |
| 2026-06-06 00:00 |
13:24:54.96 |
-10:49:55.4 |
HIP 65474 |
20.17 |
| 2026-06-06 12:00 |
13:24:54.48 |
-10:49:52.3 |
HIP 65474 |
20.24 |
| 2026-06-07 00:00 |
13:24:54.00 |
-10:49:49.3 |
HIP 65474 |
20.32 |
| 2026-06-07 12:00 |
13:24:53.53 |
-10:49:46.2 |
HIP 65474 |
20.39 |
| 2026-06-08 00:00 |
13:24:53.07 |
-10:49:43.2 |
HIP 65474 |
20.47 |
| 2026-06-08 12:00 |
13:24:52.61 |
-10:49:40.3 |
HIP 65474 |
20.54 |
| 2026-06-09 00:00 |
13:24:52.16 |
-10:49:37.3 |
HIP 65474 |
20.61 |
| 2026-06-09 12:00 |
13:24:51.71 |
-10:49:34.4 |
HIP 65474 |
20.69 |
| 2026-06-10 00:00 |
13:24:51.27 |
-10:49:31.5 |
HIP 65474 |
20.76 |
| 2026-06-10 12:00 |
13:24:50.83 |
-10:49:28.6 |
HIP 65474 |
20.83 |
| 2026-06-11 00:00 |
13:24:50.40 |
-10:49:25.8 |
HIP 65474 |
20.90 |
| 2026-06-11 12:00 |
13:24:49.98 |
-10:49:23.0 |
HIP 65474 |
20.97 |
| 2026-06-12 00:00 |
13:24:49.56 |
-10:49:20.2 |
HIP 65474 |
21.04 |
| 2026-06-12 12:00 |
13:24:49.14 |
-10:49:17.5 |
HIP 65474 |
21.12 |
| 2026-06-13 00:00 |
13:24:48.73 |
-10:49:14.8 |
HIP 65474 |
21.19 |
| 2026-06-13 12:00 |
13:24:48.33 |
-10:49:12.1 |
HIP 65474 |
21.25 |
| 2026-06-14 00:00 |
13:24:47.93 |
-10:49:09.5 |
HIP 65474 |
21.32 |
| 2026-06-14 12:00 |
13:24:47.54 |
-10:49:06.9 |
HIP 65474 |
21.39 |
| 2026-06-15 00:00 |
13:24:47.16 |
-10:49:04.3 |
HIP 65474 |
21.46 |
| 2026-06-15 12:00 |
13:24:46.78 |
-10:49:01.7 |
HIP 65474 |
21.53 |
| 2026-06-16 00:00 |
13:24:46.40 |
-10:48:59.2 |
HIP 65474 |
21.59 |
| 2026-06-16 12:00 |
13:24:46.03 |
-10:48:56.7 |
HIP 65474 |
21.66 |
| 2026-06-17 00:00 |
13:24:45.67 |
-10:48:54.3 |
HIP 65474 |
21.72 |
| 2026-06-17 12:00 |
13:24:45.31 |
-10:48:51.9 |
HIP 65474 |
21.79 |
| 2026-06-18 00:00 |
13:24:44.96 |
-10:48:49.5 |
HIP 65474 |
21.85 |
| 2026-06-18 12:00 |
13:24:44.61 |
-10:48:47.1 |
HIP 65474 |
21.91 |
| 2026-06-19 00:00 |
13:24:44.27 |
-10:48:44.8 |
HIP 65474 |
21.98 |
| 2026-06-19 12:00 |
13:24:43.94 |
-10:48:42.5 |
HIP 65474 |
22.04 |
| 2026-06-20 00:00 |
13:24:43.61 |
-10:48:40.3 |
HIP 65474 |
22.10 |
| 2026-06-20 12:00 |
13:24:43.29 |
-10:48:38.0 |
HIP 65474 |
22.16 |
| 2026-06-21 00:00 |
13:24:42.98 |
-10:48:35.9 |
HIP 65474 |
22.22 |
| 2026-06-21 12:00 |
13:24:42.67 |
-10:48:33.7 |
HIP 65474 |
22.28 |
| 2026-06-22 00:00 |
13:24:42.36 |
-10:48:31.6 |
HIP 65474 |
22.33 |