메타데이터
| 항목 |
값 |
| Designation |
C/1948 T1 (Wirtanen) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1947-09-03T21:00:21.755520Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:09Z |
| Obs used |
19 |
| NEO |
- |
| M1 |
6.000 |
| K1 |
8.250 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1949-11-26.0000000 |
| e |
1.00069715 |
| q (au) |
3.268165 |
| a (au) |
-4687.881007 |
| i (deg) |
155.078426 |
| Ω (om, deg) |
122.125436 |
| ω (w, deg) |
73.549407 |
| M (ma, deg) |
0.002500 |
밝기
산란 + 전체 선형
$$
M_a = (-0.036 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
-0.036 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.998 |
| k |
1.000 |
| 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) |
| 2026-03-26 00:00 |
16:31:25.53 |
-41:46:47.5 |
HIP 80945 |
3.76 |
| 2026-03-26 12:00 |
16:31:24.82 |
-41:46:52.0 |
HIP 80945 |
3.83 |
| 2026-03-27 00:00 |
16:31:24.10 |
-41:46:56.5 |
HIP 80945 |
3.90 |
| 2026-03-27 12:00 |
16:31:23.37 |
-41:47:00.9 |
HIP 80945 |
3.98 |
| 2026-03-28 00:00 |
16:31:22.63 |
-41:47:05.3 |
HIP 80945 |
4.06 |
| 2026-03-28 12:00 |
16:31:21.87 |
-41:47:09.7 |
HIP 80945 |
4.15 |
| 2026-03-29 00:00 |
16:31:21.10 |
-41:47:14.0 |
HIP 80945 |
4.25 |
| 2026-03-29 12:00 |
16:31:20.33 |
-41:47:18.2 |
HIP 80945 |
4.35 |
| 2026-03-30 00:00 |
16:31:19.53 |
-41:47:22.4 |
HIP 80945 |
4.46 |
| 2026-03-30 12:00 |
16:31:18.73 |
-41:47:26.6 |
HIP 80945 |
4.58 |
| 2026-03-31 00:00 |
16:31:17.92 |
-41:47:30.7 |
HIP 80945 |
4.70 |
| 2026-03-31 12:00 |
16:31:17.09 |
-41:47:34.8 |
HIP 80945 |
4.82 |
| 2026-04-01 00:00 |
16:31:16.25 |
-41:47:38.9 |
HIP 80945 |
4.95 |
| 2026-04-01 12:00 |
16:31:15.40 |
-41:47:42.9 |
HIP 80945 |
5.09 |
| 2026-04-02 00:00 |
16:31:14.54 |
-41:47:46.8 |
HIP 80945 |
5.23 |
| 2026-04-02 12:00 |
16:31:13.66 |
-41:47:50.7 |
HIP 80945 |
5.37 |
| 2026-04-03 00:00 |
16:31:12.78 |
-41:47:54.5 |
HIP 80945 |
5.52 |
| 2026-04-03 12:00 |
16:31:11.88 |
-41:47:58.4 |
HIP 80945 |
5.67 |
| 2026-04-04 00:00 |
16:31:10.98 |
-41:48:02.1 |
HIP 80945 |
5.82 |
| 2026-04-04 12:00 |
16:31:10.06 |
-41:48:05.8 |
HIP 80945 |
5.98 |
| 2026-04-05 00:00 |
16:31:09.13 |
-41:48:09.5 |
HIP 80945 |
6.15 |
| 2026-04-05 12:00 |
16:31:08.18 |
-41:48:13.1 |
HIP 80945 |
6.31 |
| 2026-04-06 00:00 |
16:31:07.23 |
-41:48:16.7 |
HIP 80945 |
6.48 |
| 2026-04-06 12:00 |
16:31:06.27 |
-41:48:20.2 |
HIP 80945 |
6.65 |
| 2026-04-07 00:00 |
16:31:05.29 |
-41:48:23.7 |
HIP 80945 |
6.83 |
| 2026-04-07 12:00 |
16:31:04.31 |
-41:48:27.1 |
HIP 80945 |
7.00 |
| 2026-04-08 00:00 |
16:31:03.31 |
-41:48:30.5 |
HIP 80945 |
7.19 |
| 2026-04-08 12:00 |
16:31:02.30 |
-41:48:33.8 |
HIP 80945 |
7.37 |
| 2026-04-09 00:00 |
16:31:01.29 |
-41:48:37.0 |
HIP 80945 |
7.55 |
| 2026-04-09 12:00 |
16:31:00.26 |
-41:48:40.3 |
HIP 80945 |
7.74 |
| 2026-04-10 00:00 |
16:30:59.22 |
-41:48:43.4 |
HIP 80945 |
7.93 |
| 2026-04-10 12:00 |
16:30:58.17 |
-41:48:46.6 |
HIP 80945 |
8.13 |
| 2026-04-11 00:00 |
16:30:57.11 |
-41:48:49.6 |
HIP 80945 |
8.32 |
| 2026-04-11 12:00 |
16:30:56.04 |
-41:48:52.7 |
HIP 80945 |
8.52 |
| 2026-04-12 00:00 |
16:30:54.96 |
-41:48:55.6 |
HIP 80945 |
8.72 |
| 2026-04-12 12:00 |
16:30:53.87 |
-41:48:58.5 |
HIP 80945 |
8.93 |
| 2026-04-13 00:00 |
16:30:52.76 |
-41:49:01.4 |
HIP 80945 |
9.13 |
| 2026-04-13 12:00 |
16:30:51.65 |
-41:49:04.2 |
HIP 80945 |
9.34 |
| 2026-04-14 00:00 |
16:30:50.53 |
-41:49:07.0 |
HIP 80945 |
9.55 |
| 2026-04-14 12:00 |
16:30:49.40 |
-41:49:09.7 |
HIP 80945 |
9.76 |
| 2026-04-15 00:00 |
16:30:48.26 |
-41:49:12.3 |
HIP 80945 |
9.97 |
| 2026-04-15 12:00 |
16:30:47.11 |
-41:49:14.9 |
HIP 80945 |
10.19 |
| 2026-04-16 00:00 |
16:30:45.95 |
-41:49:17.5 |
HIP 80945 |
10.40 |