메타데이터
| 항목 |
값 |
| Designation |
P/2013 YG46 (Spacewatch) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2017-01-19T12:53:16.437120Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:44Z |
| Obs used |
55 |
| NEO |
- |
| M1 |
10.600 |
| K1 |
10.000 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2014-01-29.0000000 |
| e |
0.45164645 |
| q (au) |
1.815243 |
| a (au) |
3.310351 |
| i (deg) |
8.219141 |
| Ω (om, deg) |
56.868085 |
| ω (w, deg) |
232.796581 |
| M (ma, deg) |
182.197613 |
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) |
| 2026-03-26 00:00 |
07:08:26.72 |
+29:54:09.7 |
HIP 34414 |
6.32 |
| 2026-03-26 12:00 |
07:08:30.33 |
+29:53:21.3 |
HIP 34414 |
6.50 |
| 2026-03-27 00:00 |
07:08:34.17 |
+29:52:32.5 |
HIP 34414 |
6.91 |
| 2026-03-27 12:00 |
07:08:38.25 |
+29:51:43.5 |
HIP 34414 |
7.53 |
| 2026-03-28 00:00 |
07:08:42.56 |
+29:50:54.1 |
HIP 34414 |
8.32 |
| 2026-03-28 12:00 |
07:08:47.11 |
+29:50:04.5 |
HIP 34414 |
9.28 |
| 2026-03-29 00:00 |
07:08:51.90 |
+29:49:14.5 |
HIP 34414 |
10.35 |
| 2026-03-29 12:00 |
07:08:56.92 |
+29:48:24.3 |
HIP 34414 |
11.53 |
| 2026-03-30 00:00 |
07:09:02.17 |
+29:47:33.8 |
HIP 34414 |
12.80 |
| 2026-03-30 12:00 |
07:09:07.65 |
+29:46:43.0 |
HIP 34414 |
14.15 |
| 2026-03-31 00:00 |
07:09:13.36 |
+29:45:51.9 |
HIP 34414 |
15.56 |
| 2026-03-31 12:00 |
07:09:19.30 |
+29:45:00.5 |
HIP 34414 |
17.04 |
| 2026-04-01 00:00 |
07:09:25.47 |
+29:44:08.9 |
HIP 34414 |
18.58 |
| 2026-04-01 12:00 |
07:09:31.86 |
+29:43:17.0 |
HIP 34677 |
19.14 |
| 2026-04-02 00:00 |
07:09:38.47 |
+29:42:24.8 |
HIP 34677 |
18.25 |
| 2026-04-02 12:00 |
07:09:45.32 |
+29:41:32.4 |
HIP 34677 |
17.44 |
| 2026-04-03 00:00 |
07:09:52.38 |
+29:40:39.7 |
HIP 34677 |
16.72 |
| 2026-04-03 12:00 |
07:09:59.66 |
+29:39:46.8 |
HIP 34677 |
16.14 |
| 2026-04-04 00:00 |
07:10:07.17 |
+29:38:53.6 |
HIP 34677 |
15.72 |
| 2026-04-04 12:00 |
07:10:14.89 |
+29:38:00.1 |
HIP 34677 |
15.49 |
| 2026-04-05 00:00 |
07:10:22.83 |
+29:37:06.4 |
HIP 34677 |
15.48 |
| 2026-04-05 12:00 |
07:10:30.99 |
+29:36:12.4 |
HIP 34677 |
15.70 |
| 2026-04-06 00:00 |
07:10:39.37 |
+29:35:18.2 |
HIP 34677 |
16.15 |
| 2026-04-06 12:00 |
07:10:47.95 |
+29:34:23.7 |
HIP 34677 |
16.84 |
| 2026-04-07 00:00 |
07:10:56.75 |
+29:33:29.0 |
HIP 34677 |
17.76 |
| 2026-04-07 12:00 |
07:11:05.77 |
+29:32:34.0 |
HIP 34677 |
18.88 |
| 2026-04-08 00:00 |
07:11:14.99 |
+29:31:38.8 |
HIP 34800 |
17.29 |
| 2026-04-08 12:00 |
07:11:24.43 |
+29:30:43.4 |
HIP 34800 |
15.16 |
| 2026-04-09 00:00 |
07:11:34.07 |
+29:29:47.7 |
HIP 34800 |
13.02 |
| 2026-04-09 12:00 |
07:11:43.92 |
+29:28:51.7 |
HIP 34800 |
10.93 |
| 2026-04-10 00:00 |
07:11:53.98 |
+29:27:55.6 |
HIP 34800 |
8.93 |
| 2026-04-10 12:00 |
07:12:04.24 |
+29:26:59.2 |
HIP 34800 |
7.15 |
| 2026-04-11 00:00 |
07:12:14.71 |
+29:26:02.5 |
HIP 34800 |
5.84 |
| 2026-04-11 12:00 |
07:12:25.38 |
+29:25:05.7 |
HIP 34800 |
5.44 |
| 2026-04-12 00:00 |
07:12:36.25 |
+29:24:08.6 |
HIP 34800 |
6.16 |
| 2026-04-12 12:00 |
07:12:47.33 |
+29:23:11.2 |
HIP 34800 |
7.75 |
| 2026-04-13 00:00 |
07:12:58.60 |
+29:22:13.6 |
HIP 34800 |
9.82 |
| 2026-04-13 12:00 |
07:13:10.07 |
+29:21:15.8 |
HIP 34800 |
12.15 |
| 2026-04-14 00:00 |
07:13:21.74 |
+29:20:17.8 |
HIP 34800 |
14.65 |
| 2026-04-14 12:00 |
07:13:33.60 |
+29:19:19.5 |
HIP 34800 |
17.26 |
| 2026-04-15 00:00 |
07:13:45.66 |
+29:18:21.1 |
HIP 34800 |
19.95 |
| 2026-04-15 12:00 |
07:13:57.92 |
+29:17:22.3 |
HIP 34800 |
22.71 |
| 2026-04-16 00:00 |
07:14:10.36 |
+29:16:23.4 |
HIP 35162 |
24.35 |