Why is the accuracy error of my calculation results so large? Especially the moon.

[ichingsoft]

Astronomy Engine is designed to be small, fast, and accurate to within ±1 arcminute. It is based on the authoritative and well-tested models VSOP87 and NOVAS C 3.1.

Is there something wrong with my code? The running environment is node.js .

const Astronomy = require('astronomy-engine');
const observer = new Astronomy.Observer(0, 0, 0);
const date = new Date('2023-01-01T00:00:00Z')
for (let body of ['Sun', 'Moon', 'Mercury', 'Venus', 'Mars', 'Jupiter', 'Saturn', 'Uranus', 'Neptune', 'Pluto']) {
    let equ_2000 = Astronomy.Equator(body, date, observer, false, true);
    console.log(body, equ_2000.ra * 15);
}

The calculated degree of the planet is：

Sun 280.84142445266076 Moon 30.45792396696944
Mercury 295.07476976548236 Venus 299.4006183356455
Mars 66.54558868798762
Jupiter 1.3125988767227075 Saturn 324.8817602609786
Uranus 42.47582030780864
Neptune 353.6326779482502 Pluto 299.8780779863024

But the calculation result of Swiss Ephemeris is:

planet longitude
Sun 280.2838870 Moon 33.6479912 Mercury 293.7019368 Venus 297.3826285 Mars 69.0657735 Jupiter 1.1929697 Saturn 322.4188522 Uranus 45.1476005 Neptune 352.8706151 Pluto 297.6578268