메타데이터
| 항목 |
값 |
| Designation |
73P/Schwassmann-Wachmann 3 |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2022-08-25T14:11:28.976640Z |
| Orbit solution date (soln_date, UTC) |
2025-08-20T11:15:26Z |
| Obs used |
515 |
| NEO |
Yes |
| M1 |
14.300 |
| K1 |
8.000 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2020-10-05.0000000 |
| e |
0.68565940 |
| q (au) |
0.972305 |
| a (au) |
3.093157 |
| i (deg) |
11.232390 |
| Ω (om, deg) |
69.644230 |
| ω (w, deg) |
199.450713 |
| M (ma, deg) |
235.062452 |
밝기
산란 + 전체 선형
$$
M_a = (13.529 + 3.580\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
13.529 |
| n |
3.580 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2021-01-13 |
2022-07-21 |
+1.3941 |
-0.399 |
| 2022-07-21 |
2022-08-23 |
-39.7191 |
+1.616 |
| 2022-08-25 |
2022-10-19 |
-39.2655 |
+0.068 |
| 2022-10-19 |
2023-08-15 |
+7.1396 |
-4.477 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
06:47:13.03 |
+27:17:29.1 |
HIP 32689 |
26.74 |
| 2026-06-01 12:00 |
06:47:39.98 |
+27:16:52.7 |
HIP 32689 |
20.78 |
| 2026-06-02 00:00 |
06:48:07.01 |
+27:16:16.1 |
HIP 32689 |
14.86 |
| 2026-06-02 12:00 |
06:48:34.10 |
+27:15:39.2 |
HIP 32689 |
9.07 |
| 2026-06-03 00:00 |
06:49:01.27 |
+27:15:02.2 |
HIP 32689 |
4.12 |
| 2026-06-03 12:00 |
06:49:28.52 |
+27:14:24.9 |
HIP 32689 |
5.05 |
| 2026-06-04 00:00 |
06:49:55.83 |
+27:13:47.3 |
HIP 32689 |
10.42 |
| 2026-06-04 12:00 |
06:50:23.21 |
+27:13:09.5 |
HIP 32777 |
13.74 |
| 2026-06-05 00:00 |
06:50:50.66 |
+27:12:31.5 |
HIP 32777 |
16.33 |
| 2026-06-05 12:00 |
06:51:18.19 |
+27:11:53.3 |
HIP 32777 |
20.50 |
| 2026-06-06 00:00 |
06:51:45.78 |
+27:11:14.8 |
HIP 32973 |
20.59 |
| 2026-06-06 12:00 |
06:52:13.43 |
+27:10:36.0 |
HIP 32973 |
20.84 |
| 2026-06-07 00:00 |
06:52:41.16 |
+27:09:57.1 |
HIP 33149 |
20.92 |
| 2026-06-07 12:00 |
06:53:08.95 |
+27:09:17.9 |
HIP 33149 |
15.81 |
| 2026-06-08 00:00 |
06:53:36.80 |
+27:08:38.4 |
HIP 33149 |
11.81 |
| 2026-06-08 12:00 |
06:54:04.72 |
+27:07:58.7 |
HIP 33149 |
10.32 |
| 2026-06-09 00:00 |
06:54:32.71 |
+27:07:18.7 |
HIP 33149 |
12.32 |
| 2026-06-09 12:00 |
06:55:00.75 |
+27:06:38.5 |
HIP 33268 |
14.82 |
| 2026-06-10 00:00 |
06:55:28.86 |
+27:05:58.0 |
HIP 33331 |
12.73 |
| 2026-06-10 12:00 |
06:55:57.04 |
+27:05:17.3 |
HIP 33331 |
11.87 |
| 2026-06-11 00:00 |
06:56:25.27 |
+27:04:36.4 |
HIP 33331 |
14.11 |
| 2026-06-11 12:00 |
06:56:53.56 |
+27:03:55.2 |
HIP 33501 |
16.79 |
| 2026-06-12 00:00 |
06:57:21.91 |
+27:03:13.7 |
HIP 33501 |
12.32 |
| 2026-06-12 12:00 |
06:57:50.32 |
+27:02:32.0 |
HIP 33501 |
10.11 |
| 2026-06-13 00:00 |
06:58:18.79 |
+27:01:50.0 |
HIP 33501 |
11.57 |
| 2026-06-13 12:00 |
06:58:47.31 |
+27:01:07.8 |
HIP 33501 |
15.72 |
| 2026-06-14 00:00 |
06:59:15.89 |
+27:00:25.3 |
HIP 33712 |
15.23 |
| 2026-06-14 12:00 |
06:59:44.53 |
+26:59:42.5 |
HIP 33712 |
9.72 |
| 2026-06-15 00:00 |
07:00:13.22 |
+26:58:59.5 |
HIP 33712 |
6.30 |
| 2026-06-15 12:00 |
07:00:41.96 |
+26:58:16.3 |
HIP 33712 |
8.23 |
| 2026-06-16 00:00 |
07:01:10.76 |
+26:57:32.7 |
HIP 33712 |
13.38 |
| 2026-06-16 12:00 |
07:01:39.61 |
+26:56:49.0 |
HIP 33712 |
19.35 |
| 2026-06-17 00:00 |
07:02:08.50 |
+26:56:04.9 |
HIP 34030 |
20.13 |
| 2026-06-17 12:00 |
07:02:37.45 |
+26:55:20.6 |
HIP 34030 |
14.14 |
| 2026-06-18 00:00 |
07:03:06.45 |
+26:54:36.1 |
HIP 34030 |
8.87 |
| 2026-06-18 12:00 |
07:03:35.49 |
+26:53:51.3 |
HIP 34030 |
6.48 |
| 2026-06-19 00:00 |
07:04:04.58 |
+26:53:06.2 |
HIP 34030 |
9.51 |
| 2026-06-19 12:00 |
07:04:33.72 |
+26:52:20.9 |
HIP 34030 |
14.98 |
| 2026-06-20 00:00 |
07:05:02.90 |
+26:51:35.3 |
HIP 34030 |
21.08 |
| 2026-06-20 12:00 |
07:05:32.13 |
+26:50:49.4 |
HIP 34030 |
27.40 |
| 2026-06-21 00:00 |
07:06:01.40 |
+26:50:03.3 |
HIP 34030 |
33.82 |
| 2026-06-21 12:00 |
07:06:30.72 |
+26:49:16.9 |
HIP 34500 |
32.19 |
| 2026-06-22 00:00 |
07:07:00.07 |
+26:48:30.3 |
HIP 34500 |
25.59 |