메타데이터
| 항목 |
값 |
| Designation |
C/2025 Y3 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2026-01-13T16:51:06.096960Z |
| Orbit solution date (soln_date, UTC) |
2026-01-20T12:12:02Z |
| Obs used |
27 |
| NEO |
- |
| M1 |
16.800 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2025-12-27T09:18:59.788800Z |
| Discovery magnitude (MPC) |
21.65 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2026-01-02.0000000 |
| e |
1.00074191 |
| q (au) |
2.227313 |
| a (au) |
-3002.143709 |
| i (deg) |
89.548987 |
| Ω (om, deg) |
272.966956 |
| ω (w, deg) |
219.383051 |
| M (ma, deg) |
-0.000070 |
밝기
산란 + 전체 선형
$$
M_a = (17.597 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
17.597 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.800 |
| 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
찾아보기
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
04:08:55.96 |
-39:15:18.3 |
HIP 19238 |
23.04 |
| 2026-03-26 12:00 |
04:09:10.64 |
-39:16:01.6 |
HIP 19238 |
24.88 |
| 2026-03-27 00:00 |
04:09:25.67 |
-39:16:46.8 |
HIP 19238 |
26.96 |
| 2026-03-27 12:00 |
04:09:41.04 |
-39:17:33.8 |
HIP 19238 |
29.25 |
| 2026-03-28 00:00 |
04:09:56.75 |
-39:18:22.6 |
HIP 19238 |
31.72 |
| 2026-03-28 12:00 |
04:10:12.80 |
-39:19:13.2 |
HIP 19238 |
34.35 |
| 2026-03-29 00:00 |
04:10:29.19 |
-39:20:05.7 |
HIP 19238 |
37.13 |
| 2026-03-29 12:00 |
04:10:45.91 |
-39:21:00.0 |
HIP 19238 |
40.04 |
| 2026-03-30 00:00 |
04:11:02.96 |
-39:21:56.3 |
HIP 19238 |
43.06 |
| 2026-03-30 12:00 |
04:11:20.33 |
-39:22:54.4 |
HIP 19768 |
43.63 |
| 2026-03-31 00:00 |
04:11:38.03 |
-39:23:54.5 |
HIP 19768 |
40.34 |
| 2026-03-31 12:00 |
04:11:56.06 |
-39:24:56.5 |
HIP 19768 |
37.03 |
| 2026-04-01 00:00 |
04:12:14.40 |
-39:26:00.5 |
HIP 19768 |
33.71 |
| 2026-04-01 12:00 |
04:12:33.06 |
-39:27:06.4 |
HIP 19768 |
30.42 |
| 2026-04-02 00:00 |
04:12:52.04 |
-39:28:14.3 |
HIP 19768 |
27.19 |
| 2026-04-02 12:00 |
04:13:11.33 |
-39:29:24.2 |
HIP 19768 |
24.07 |
| 2026-04-03 00:00 |
04:13:30.93 |
-39:30:36.1 |
HIP 19768 |
21.15 |
| 2026-04-03 12:00 |
04:13:50.84 |
-39:31:50.0 |
HIP 19768 |
18.57 |
| 2026-04-04 00:00 |
04:14:11.06 |
-39:33:06.0 |
HIP 19768 |
16.53 |
| 2026-04-04 12:00 |
04:14:31.58 |
-39:34:24.0 |
HIP 19768 |
15.32 |
| 2026-04-05 00:00 |
04:14:52.41 |
-39:35:44.1 |
HIP 19898 |
14.24 |
| 2026-04-05 12:00 |
04:15:13.54 |
-39:37:06.2 |
HIP 19898 |
10.09 |
| 2026-04-06 00:00 |
04:15:34.96 |
-39:38:30.5 |
HIP 19898 |
6.11 |
| 2026-04-06 12:00 |
04:15:56.69 |
-39:39:56.9 |
HIP 19898 |
3.28 |
| 2026-04-07 00:00 |
04:16:18.71 |
-39:41:25.4 |
HIP 19898 |
4.89 |
| 2026-04-07 12:00 |
04:16:41.03 |
-39:42:56.0 |
HIP 19898 |
8.86 |
| 2026-04-08 00:00 |
04:17:03.64 |
-39:44:28.8 |
HIP 19898 |
13.28 |
| 2026-04-08 12:00 |
04:17:26.54 |
-39:46:03.8 |
HIP 20061 |
13.98 |
| 2026-04-09 00:00 |
04:17:49.73 |
-39:47:40.9 |
HIP 20061 |
13.66 |
| 2026-04-09 12:00 |
04:18:13.21 |
-39:49:20.3 |
HIP 20061 |
14.96 |
| 2026-04-10 00:00 |
04:18:36.98 |
-39:51:01.9 |
HIP 20061 |
17.58 |
| 2026-04-10 12:00 |
04:19:01.03 |
-39:52:45.7 |
HIP 20061 |
21.09 |
| 2026-04-11 00:00 |
04:19:25.36 |
-39:54:31.8 |
HIP 20061 |
25.14 |
| 2026-04-11 12:00 |
04:19:49.98 |
-39:56:20.2 |
HIP 20061 |
29.54 |
| 2026-04-12 00:00 |
04:20:14.88 |
-39:58:10.8 |
HIP 20061 |
34.19 |
| 2026-04-12 12:00 |
04:20:40.05 |
-40:00:03.7 |
HIP 20061 |
39.03 |
| 2026-04-13 00:00 |
04:21:05.50 |
-40:01:58.9 |
HIP 20554 |
35.89 |
| 2026-04-13 12:00 |
04:21:31.23 |
-40:03:56.5 |
HIP 20554 |
30.94 |
| 2026-04-14 00:00 |
04:21:57.24 |
-40:05:56.4 |
HIP 20500 |
25.92 |
| 2026-04-14 12:00 |
04:22:23.52 |
-40:07:58.7 |
HIP 20500 |
20.97 |
| 2026-04-15 00:00 |
04:22:50.07 |
-40:10:03.4 |
HIP 20500 |
16.24 |
| 2026-04-15 12:00 |
04:23:16.89 |
-40:12:10.4 |
HIP 20500 |
12.11 |
| 2026-04-16 00:00 |
04:23:43.98 |
-40:14:19.9 |
HIP 20500 |
9.51 |